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Calculation between two portals

Question asked by sam0723 on Jun 1, 2016
Latest reply on Jun 7, 2016 by sam0723

Hello, everyone, I am new to filemaker. I would like to know how to set up a portal calculating the difference between two portals.

 

For example,

 

Portals

 

Date                        Time               Time used/hrs

1/1/2016                  9:00                    9

1/1/2016                 18:00                   9

1/2/2016                  9:00                    11

1/2/2016                  20:00                  11

 

how could i get the result every two portals? Thank you

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