Hi,
I have an requirement where i need to compare data from existing data in DB.
Example;
Table A having 1000 records. On UI i am showing some records(20) on basis of some filter criteria(2 Colmuns) . Now I am modifying 5 records (Update/Delete).
I need to put validation that combination of these two columns should be unique in DB.
Either i can do put validation on UI or through expression rule i can check in DB.
Please share some approach code on that. If possible can anyone share sample code also .
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