I'm using simple app to describe my problem. ...

[dev_bc]

I’m using simple app to describe my problem. Following is the app https://www.appsheet.com/samples/This-app-shows-how-to-use-reference-actions?appGuidString=e76d2e73-...

I have a table call Child with Number column data. I would like to create a shortcut button in the Child_Detail call “Same Num”. This button only appear when the Number is same in table Child.

The action is when the button is click, it will trigger “+1” button to increase the Number data.

How to create the expression button in the Child_Detail when the number condition are same?

[Aleksi_Alkio]

You could check it with COUNT(SELECT(TableName[Number],[Number]=[THISROW].[Number]))>1