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    El tema es que medir duración de algo es como que lógicamente
    incompatible con la hipótesis de que las acciones son instantáneas
    (es decir de duración 0, por lo cual la sumatoria siempre seria 0)<br>
    <br>
    Para calcular la cantidad de minutos ocupados en eso, se me ocurren
    algunas cosas:<br>
    <br>
    - asumir una duracion por tarea, es decir, si aprete enter en t0, la
    tarea duro hasta t0+5min<br>
    - agregar una columna de 'fin' de la accion, tratando de medir
    cuando ese fin ocurre, creo que esto es lo mas razonable, ya que en
    realidad nada es instantáneo<br>
    - asumir que la duracion de la tarea es entre enters sucesivos del
    mismo usuario, asumiendo que trabajan siempre, lo cual te deja
    abierta la duracion del ultimo 'enter' del dia<br>
    <br>
    - Y finalmente, pensar si en el caso de que realmente las acciones
    sean logicamente instantaneas, si la metrica 'minutos trabajados'
    tiene sentido, si no hace falta una metrica que sea 'cantidad de
    enters por unidad de tiempo', o algo parecido.<br>
    <br>
    Creo que como dice Chicken, falta algo en el modelado de tu
    realidad.<br>
    <br>
    s2<br>
    <br>
    ~C.<br>
    <br>
    <div class="moz-cite-prefix">On 3/25/13 11:45 AM, Gustavo Azambuja
      wrote:<br>
    </div>
    <blockquote
cite="mid:CABGE7dteqdW6jbfHaQ+C4i7jZYv2UAHZqHJY3mGyu1FwZdnSow@mail.gmail.com"
      type="cite">
      <div dir="ltr">Carlos, gracias por responder... es que no son
        "tareas" mas bien son "acciones"...
        <div style="">Imaginen que tienen una tabla donde los
          funcionarios que tienen cada ENTER que apreto un
          usuario/funcionario, y en la columna date, lo que aparece es
          la hora en que apreto ENTER...</div>
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        </div>
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        </div>
        <div style="">
          <pre style="white-space:pre-wrap;max-height:600px;width:auto;background-color:rgb(238,238,238);margin-bottom:10px;padding:5px;vertical-align:baseline;line-height:18px;font-size:14px;overflow:auto;font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;margin-top:0px;border:0px">
<code style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif"><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">id</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(0,0,139)">user</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> action</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:tr
 ansparent
">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> date
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> user1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> a1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">2013-03-20</span><span style="margin:0px;padding:0px;border:0px;vertical-a
 lign:base
line;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">10</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">00</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">01</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">2</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> user2</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> a1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">2013-03-20</span><span style="margin:0px;padding:0px;border:0px;vertical-a
 lign:base
line;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">10</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">00</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">03</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">3</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> user2</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> a1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">2013-03-20</span><span style="margin:0px;padding:0px;border:0px;vertical-a
 lign:base
line;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">10</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">00</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">12</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">4</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> user3</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> a1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">2013-03-20</span><span style="margin:0px;padding:0px;border:0px;vertical-a
 lign:base
line;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">10</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">00</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">20</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">5</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> user2</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> a1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">2013-03-20</span><span style="margin:0px;padding:0px;border:0px;vertical-a
 lign:base
line;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">10</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">00</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"><font color="#800000">24
...
</font><span style="background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline"><font color="#800000">10</font></span><span style="color:rgb(34,34,34);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">,</span><span style="color:rgb(34,34,34);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline"> user3</span><span style="color:rgb(34,34,34);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">,</span><span style="color:rgb(34,34,34);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline"> a1</span><span style="color:rgb(34,34,34);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">,</span><span style="color:rgb(34,34,34);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline"> </span><span style="color:rgb(128,0,0);background-color:transparent;ma
 rgin:0px;
padding:0px;border:0px;vertical-align:baseline">2013-03-20</span><span style="color:rgb(34,34,34);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline"> </span><span style="color:rgb(128,0,0);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">10</span><span style="color:rgb(34,34,34);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">:</span><span style="color:rgb(128,0,0);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">02</span><span style="color:rgb(34,34,34);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">:</span><span style="color:rgb(128,0,0);background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">35
...
<span style="background-color:transparent;color:rgb(34,34,34);margin:0px;padding:0px;border:0px;vertical-align:baseline"><font color="#800000">16</font></span><span style="background-color:transparent;color:rgb(34,34,34);margin:0px;padding:0px;border:0px;vertical-align:baseline">,</span><span style="background-color:transparent;color:rgb(34,34,34);margin:0px;padding:0px;border:0px;vertical-align:baseline"> user3</span><span style="background-color:transparent;color:rgb(34,34,34);margin:0px;padding:0px;border:0px;vertical-align:baseline">,</span><span style="background-color:transparent;color:rgb(34,34,34);margin:0px;padding:0px;border:0px;vertical-align:baseline"> a1</span><span style="background-color:transparent;color:rgb(34,34,34);margin:0px;padding:0px;border:0px;vertical-align:baseline">,</span><span style="background-color:transparent;color:rgb(34,34,34);margin:0px;padding:0px;border:0px;vertical-align:baseline"> </span><span style="background-color:transparent;margin:0
 px;paddin
g:0px;border:0px;vertical-align:baseline">2013-03-20</span><span style="background-color:transparent;color:rgb(34,34,34);margin:0px;padding:0px;border:0px;vertical-align:baseline"> </span><span style="background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">10</span><span style="background-color:transparent;color:rgb(34,34,34);margin:0px;padding:0px;border:0px;vertical-align:baseline">:</span><span style="background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">04</span><span style="background-color:transparent;color:rgb(34,34,34);margin:0px;padding:0px;border:0px;vertical-align:baseline">:</span><span style="background-color:transparent;margin:0px;padding:0px;border:0px;vertical-align:baseline">01</span>


</span><font color="#800000">
</font></span></code></pre>
        </div>
        <div style=""><br>
        </div>
        <div style="">El usuario user1: apreto solo una vez ENTER: 10h
          00m 01s; el user2, :03s, :12s, y :24s</div>
        <div style="">Ahora, por ejemplo el user3, esta "apretando
          ENTER" cada algunos cuantos segundos, y luego del id=16 no
          aparece mas... podría decir entonces que el user3 trabajó
          desde 10:00 hasta las 10:04 (4 minutos trabajados)</div>
        <div style=""><br>
        </div>
        <div style="">el tema es como consigo llegar a esa conclusion
          usando PHP y MySQL...</div>
        <div style=""><br>
        </div>
        <div style="">Como dije antes, asumo que el usuario ya no está
          trabajando si pasan mas de 5 minutos sin "acciones"
          realizadas.</div>
        <div style=""><br>
        </div>
        <div style=""><br>
        </div>
        <div style=""><br>
        </div>
        <div style=""><br>
        </div>
        <div style=""><br>
        </div>
      </div>
      <div class="gmail_extra"><br>
        <br>
        <div class="gmail_quote">2013/3/25 Carlos M. Martinez <span
            dir="ltr"><<a moz-do-not-send="true"
              href="mailto:carlosmarcelomartinez@gmail.com"
              target="_blank">carlosmarcelomartinez@gmail.com</a>></span><br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div bgcolor="#FFFFFF" text="#000000"> Pero como definis la
              'duracion' de cada tarea ? el intervalo entre dos entradas
              ? <br>
              <div>
                <div class="h5"> <br>
                  <div>On 3/25/13 10:50 AM, Gustavo Azambuja wrote:<br>
                  </div>
                  <blockquote type="cite">
                    <div dir="ltr">No, la tarea es "instantanea"...
                      digamos, para entender, que cada registro es una
                      pulsación de ENTER en el teclado del usuario...
                      sabiendo eso, y que jamas pasan 5 minutos sin dar
                      ENTER a menos que no estén trabajando... como
                      consigo saber los "minutos trabajados por
                      operador" (o la suma de todos los operadores)?
                      <div> <br>
                      </div>
                      <div><br>
                      </div>
                    </div>
                    <div class="gmail_extra"><br>
                      <br>
                      <div class="gmail_quote">2013/3/25 Chicken Urine <span
                          dir="ltr"><<a moz-do-not-send="true"
                            href="mailto:chickenurine@gmail.com"
                            target="_blank">chickenurine@gmail.com</a>></span><br>
                        <blockquote class="gmail_quote" style="margin:0
                          0 0 .8ex;border-left:1px #ccc
                          solid;padding-left:1ex">
                          <div dir="ltr">
                            <div class="gmail_default">Ok, entonces el
                              date ese es la hora de inicio de la tarea,
                              por lo que supongo que la duración de una
                              tarea es el tiempo entre 2 registros?</div>
                          </div>
                          <div class="gmail_extra">
                            <div><br clear="all">
                              <div>
                                <div><br>
                                </div>
                                .:-:ChiCkENURiNE:-:.
                                <div><span>+ </span><span>El <a
                                      moz-do-not-send="true"
                                      href="http://groups.google.com/group/spam-a-lot/"
                                      target="_blank">SPAM</a> tiene su
                                    lugar.</span></div>
                              </div>
                              <br>
                              <br>
                            </div>
                            <div>
                              <div>
                                <div class="gmail_quote">2013/3/25
                                  Gustavo Azambuja <span dir="ltr"><<a
                                      moz-do-not-send="true"
                                      href="mailto:hola@gazambuja.com"
                                      target="_blank">hola@gazambuja.com</a>></span><br>
                                  <blockquote class="gmail_quote"
                                    style="margin:0 0 0
                                    .8ex;border-left:1px #ccc
                                    solid;padding-left:1ex">
                                    <p dir="ltr">La columna date tiene
                                      el datetime del evento (q ejecutó
                                      una acción) </p>
                                    <p dir="ltr">En definitiva tengo una
                                      lista de eventos de diferentes
                                      usuarios y necesito calcular los
                                      "minutos trabajados totales) </p>
                                    <p dir="ltr">Para el cálculo asumo
                                      que si el usuario no ejecuta
                                      eventos en 5 minutos no está
                                      trabajando. </p>
                                    <p dir="ltr">Uso MySQL, y podría
                                      completar el cálculo con php. </p>
                                    <div class="gmail_quote">El mar 25,
                                      2013 8:20 a.m., "Chicken Urine"
                                      <<a moz-do-not-send="true"
                                        href="mailto:chickenurine@gmail.com"
                                        target="_blank">chickenurine@gmail.com</a>>

                                      escribió:
                                      <div>
                                        <div><br type="attribution">
                                          <blockquote
                                            class="gmail_quote"
                                            style="margin:0 0 0
                                            .8ex;border-left:1px #ccc
                                            solid;padding-left:1ex">
                                            <div dir="ltr">
                                              <div class="gmail_default">Gustavo,
                                                no me queda muy claro el
                                                ejemplo. La columna date
                                                guarda un resultado de
                                                HH:MM:ss que llevó un
                                                tarea particular? O es
                                                la hora de comienzo/fin?</div>
                                              <div class="gmail_default">Que
                                                rdbms estás utilizando?
                                                Ya que hay funciones
                                                específicas en cada
                                                motor para el manejo de
                                                tipo de datos date.</div>
                                            </div>
                                            <div class="gmail_extra"> <br
                                                clear="all">
                                              <div>
                                                <div><br>
                                                </div>
                                                .:-:ChiCkENURiNE:-:.
                                                <div><span>+ </span><span>El
                                                    <a
                                                      moz-do-not-send="true"
href="http://groups.google.com/group/spam-a-lot/" target="_blank">SPAM</a>
                                                    tiene su lugar.</span></div>
                                              </div>
                                              <br>
                                              <br>
                                              <div class="gmail_quote">2013/3/24

                                                Gustavo Azambuja <span
                                                  dir="ltr"><<a
                                                    moz-do-not-send="true"
href="mailto:hola@gazambuja.com" target="_blank">hola@gazambuja.com</a>></span><br>
                                                <blockquote
                                                  class="gmail_quote"
                                                  style="margin:0 0 0
                                                  .8ex;border-left:1px
                                                  #ccc
                                                  solid;padding-left:1ex">
                                                  <div dir="ltr">
                                                    <div>Alguien me
                                                      puede ayudar con
                                                      esta query?</div>
                                                    <div><br>
                                                    </div>
                                                    <div>básicamente,
                                                      necesito conseguir
                                                      en base a una
                                                      tabla que tiene
                                                      acciones
                                                      realizadas por mis
                                                      usuarios
                                                      (funcionarios)
                                                      durante cada
                                                      minuto. Ahora,
                                                      necesito en base a
                                                      esa tabla saber
                                                      los "minutos
                                                      trabajados"</div>
                                                    <div><br>
                                                    </div>
                                                    <a
                                                      moz-do-not-send="true"
href="http://stackoverflow.com/questions/15606675/minutes-work-by-users-how-to-make-this-query"
                                                      target="_blank">http://stackoverflow.com/questions/15606675/minutes-work-by-users-how-to-make-this-query</a><br
                                                      clear="all">
                                                    <div><br>
                                                    </div>
                                                    <div>
                                                      <pre style="max-height:600px;width:auto;background-color:rgb(238,238,238);margin-bottom:10px;padding:5px;vertical-align:baseline;line-height:18px;font-size:14px;overflow:auto;font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;margin-top:0px;border:0px">




<code style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif"><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">id</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(0,0,139)">user</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> action</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:tr
 ansparent
">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> date
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> user1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> a1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)"><a moz-do-not-send="true" href="tel:2013-03-20" value="+59820130320" targe
 t="_blank
">2013-03-20</a></span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">10</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">00</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">01</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">2</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> user2</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> a1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)"><a moz-do-not-send="true" href="tel:2013-03-20" value="+59820130320" targe
 t="_blank
">2013-03-20</a></span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">10</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">00</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">03</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">3</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> user2</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> a1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)"><a moz-do-not-send="true" href="tel:2013-03-20" value="+59820130320" targe
 t="_blank
">2013-03-20</a></span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">10</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">00</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">12</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">4</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> user3</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> a1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)"><a moz-do-not-send="true" href="tel:2013-03-20" value="+59820130320" targe
 t="_blank
">2013-03-20</a></span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">10</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">00</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">20</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">5</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> user2</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> a1</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">,</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)"><a moz-do-not-send="true" href="tel:2013-03-20" value="+59820130320" targe
 t="_blank
">2013-03-20</a></span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent"> </span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">10</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">00</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">:</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;color:rgb(128,0,0)">24</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">....</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">
</span><span style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">...</span></code></pre>
                                                      <p> Por ejemplo:</p>
                                                      <ol>
                                                        <li
style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;word-wrap:break-word">Si

                                                          tengo solo un
                                                          funcionario
                                                          trabajando las
                                                          24h, tendré:
                                                          24h*60m = 1440
                                                          minutos
                                                          trabajados en
                                                          el día.</li>
                                                        <li
style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;word-wrap:break-word">Si

                                                          tengo 2
                                                          funcionarios
                                                          durante todo
                                                          el día (24h)
                                                          tendré: 2880
                                                          minutos
                                                          trabajados
                                                          hoy...</li>
                                                        <li
style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent;word-wrap:break-word">Si

                                                          tengo los
                                                          mismos dos
                                                          funcionarios,
                                                          pero
                                                          trabajando 12h
                                                          cada uno,
                                                          vuelvo a tener
                                                          los 1440
                                                          m/día.</li>
                                                      </ol>
                                                      <div><font
                                                          color="#000000"
                                                          face="Arial,
                                                          Liberation
                                                          Sans, DejaVu
                                                          Sans,
                                                          sans-serif"><span
style="font-size:14px;line-height:18px">Alguna idea de como podría armar
                                                          una query que
                                                          me de ésto? o
                                                          como mucho con
                                                          algo de PHP
                                                          ademas de la
                                                          query.</span></font></div>
                                                    </div>
                                                    <div><font
                                                        color="#000000"
                                                        face="Arial,
                                                        Liberation Sans,
                                                        DejaVu Sans,
                                                        sans-serif"><span
style="font-size:14px;line-height:18px"><br>
                                                        </span></font></div>
                                                    <div><font
                                                        color="#000000"
                                                        face="Arial,
                                                        Liberation Sans,
                                                        DejaVu Sans,
                                                        sans-serif"><span
style="font-size:14px;line-height:18px">Gracias!</span></font></div>
                                                    <span><font
                                                        color="#888888">
                                                        <div><br>
                                                        </div>
                                                        <div><br>
                                                        </div>
                                                        -- <br>
                                                        <font
                                                          face="'trebuchet
                                                          ms',
                                                          sans-serif">Gustavo
                                                          Azambuja<br>
                                                        </font><a
                                                          moz-do-not-send="true"
href="http://gazambuja.com" target="_blank"><font face="'trebuchet ms',
                                                          sans-serif">http://gazambuja.com</font></a>
                                                        <div> <br>
                                                          <font
                                                          face="'courier
                                                          new',
                                                          monospace"><span
style="font-size:x-small">Uruguay:</span></font><font face="'courier
                                                          new',
                                                          monospace"><span
style="white-space:pre-wrap"><span style="font-size:x-small">     </span></span></font><font
                                                          face="'courier
                                                          new',
                                                          monospace"><span
style="font-size:x-small"><b><a moz-do-not-send="true"
                                                          href="tel:091%20300%20333"
value="+59891300333" target="_blank">091 300 333</a></b> (Montevideo -
                                                          Mobile)</span></font><font
                                                          face="'courier
                                                          new',
                                                          monospace"><span
style="font-size:x-small"><br>
                                                          </span></font></div>
                                                      </font></span></div>
                                                  <br>
_______________________________________________<br>
                                                  Uylug-programming
                                                  mailing list<br>
                                                  <a
                                                    moz-do-not-send="true"
href="mailto:Uylug-programming@listas.uylug.org.uy" target="_blank">Uylug-programming@listas.uylug.org.uy</a><br>
                                                  <a
                                                    moz-do-not-send="true"
href="http://listas.uylug.org.uy/listinfo.cgi/uylug-programming-uylug.org.uy"
                                                    target="_blank">http://listas.uylug.org.uy/listinfo.cgi/uylug-programming-uylug.org.uy</a><br>
                                                  <br>
                                                </blockquote>
                                              </div>
                                              <br>
                                            </div>
                                            <br>
_______________________________________________<br>
                                            Uylug-programming mailing
                                            list<br>
                                            <a moz-do-not-send="true"
                                              href="mailto:Uylug-programming@listas.uylug.org.uy"
                                              target="_blank">Uylug-programming@listas.uylug.org.uy</a><br>
                                            <a moz-do-not-send="true"
href="http://listas.uylug.org.uy/listinfo.cgi/uylug-programming-uylug.org.uy"
                                              target="_blank">http://listas.uylug.org.uy/listinfo.cgi/uylug-programming-uylug.org.uy</a><br>
                                            <br>
                                          </blockquote>
                                        </div>
                                      </div>
                                    </div>
                                    <br>
_______________________________________________<br>
                                    Uylug-programming mailing list<br>
                                    <a moz-do-not-send="true"
                                      href="mailto:Uylug-programming@listas.uylug.org.uy"
                                      target="_blank">Uylug-programming@listas.uylug.org.uy</a><br>
                                    <a moz-do-not-send="true"
href="http://listas.uylug.org.uy/listinfo.cgi/uylug-programming-uylug.org.uy"
                                      target="_blank">http://listas.uylug.org.uy/listinfo.cgi/uylug-programming-uylug.org.uy</a><br>
                                    <br>
                                  </blockquote>
                                </div>
                                <br>
                              </div>
                            </div>
                          </div>
                          <br>
_______________________________________________<br>
                          Uylug-programming mailing list<br>
                          <a moz-do-not-send="true"
                            href="mailto:Uylug-programming@listas.uylug.org.uy"
                            target="_blank">Uylug-programming@listas.uylug.org.uy</a><br>
                          <a moz-do-not-send="true"
href="http://listas.uylug.org.uy/listinfo.cgi/uylug-programming-uylug.org.uy"
                            target="_blank">http://listas.uylug.org.uy/listinfo.cgi/uylug-programming-uylug.org.uy</a><br>
                          <br>
                        </blockquote>
                      </div>
                      <br>
                      <br clear="all">
                      <div><br>
                      </div>
                      -- <br>
                      <font face="'trebuchet ms', sans-serif">Gustavo
                        Azambuja<br>
                      </font><a moz-do-not-send="true"
                        href="http://gazambuja.com" target="_blank"><font
                          face="'trebuchet ms', sans-serif">http://gazambuja.com</font></a>
                      <div> <br>
                        <font face="'courier new', monospace"><span
                            style="font-size:x-small">Uruguay:</span></font><font
                          face="'courier new', monospace"><span
                            style="white-space:pre-wrap"><span
                              style="font-size:x-small">     </span></span></font><font
                          face="'courier new', monospace"><span
                            style="font-size:x-small"><b>091 300 333</b>
                            (Montevideo - Mobile)</span></font><font
                          face="'courier new', monospace"><span
                            style="font-size:x-small"><br>
                          </span></font></div>
                    </div>
                    <br>
                    <fieldset></fieldset>
                    <br>
                    <pre>_______________________________________________
Uylug-programming mailing list
<a moz-do-not-send="true" href="mailto:Uylug-programming@listas.uylug.org.uy" target="_blank">Uylug-programming@listas.uylug.org.uy</a>
<a moz-do-not-send="true" href="http://listas.uylug.org.uy/listinfo.cgi/uylug-programming-uylug.org.uy" target="_blank">http://listas.uylug.org.uy/listinfo.cgi/uylug-programming-uylug.org.uy</a>
</pre>
                  </blockquote>
                  <br>
                </div>
              </div>
            </div>
          </blockquote>
        </div>
        <br>
        <br clear="all">
        <div><br>
        </div>
        -- <br>
        <font face="'trebuchet ms', sans-serif">Gustavo Azambuja<br>
        </font><a moz-do-not-send="true" href="http://gazambuja.com"
          target="_blank"><font face="'trebuchet ms', sans-serif">http://gazambuja.com</font></a>
        <div>
          <br>
          <font face="'courier new', monospace"><span
              style="font-size:x-small">Uruguay:</span></font><font
            face="'courier new', monospace"><span
              style="white-space:pre"><span style="font-size:x-small">    
              </span></span></font><font face="'courier new', monospace"><span
              style="font-size:x-small"><b>091 300 333</b> (Montevideo -
              Mobile)</span></font><font face="'courier new', monospace"><span
              style="font-size:x-small"><br>
            </span></font></div>
      </div>
    </blockquote>
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