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Power Platform Community / Forums / Power Apps / Where to start on a tw...
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Where to start on a two-table Canvas (?) app

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I'm pretty new to PowerApps and would appreciate an idea of how to begin on this task: A school gives students points for good behaviour, which the students can then spend at a gift shop. The staff running the gift shop want an easy way to know how many points a student has to spend. I want to create an app that will show the total number of points a student has available to spend (Total points- previous transactions), and allow the user to create new transaction records. I've got a table of the students total points, and was hoping that alongside a table of transaction records, something could be created. It seems like the first two challenges are;
  1. How can I get values from these two tables (Table 1: Student name, Table 1: Total Points, Table 2: Sum of transaction costs) displayed side-by-side?
    1. I can see that Edit Forms don't permit data drawn from multiple sources
  2. How can I aggregate/calculate these values, (Sum of transaction costs, Total points-sum of transaction costs)
Any advice appreciated
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  • Suggested answer
    KeithAtherton Profile Picture
    3,709 Most Valuable Professional on at
    Hey. If you're using Dataverse, you could have the two tables you mentioned:
    • Student
    • Transaction
    The Student table could have a rollup column which totals all points from the Transaction table. More info here:
     
    Please note that rollup columns are calculated based on scheduled jobs, they are not calculated in real-time.
     
    If you need a real-time calculation then you may want to perform the calculation in the app using Power Fx.

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