I would like to ask for assistance I am new with appsheet.
I have 2 tables “Payments” and “User”
In “User” table there are 3 columns [Username], [Userrole] and [System Password]
In “Payments” table there are 8 columns. Two of the column [Username] and [System Password] are similar to “User” table.
What I want to achieve in valid if “Payments” table. The column [Username] in Payments table should match with User Table and the column [System Password] in “Payments” table should match the column [System Password] in “User” table.
Can someone suggest a expression?