Question

I have a table voucher_master. I want to make composite unique key which satisfies the below condition

voucher_type    voucher_sub_type     date        Abbreviation
 INV                DOM              1/1/2000       ID            allowed
 INV                DOM              15/1/2000      ID            allowed

 INV                INT              1/1/2000       ID            not allowed
 INV                INT              15/3/2012      ID            not allowed

If a particular abbreviation is created for voucher_type and voucher_sub_type then the same abbreviation cannot be created for any combination of voucher_type and voucher_sub_type.

However, if the abbreviation is created for a voucher_type and voucher_sub_type then the same abbreviation can be created with a difference of date for the same combination for which it was originally made. The same abbreviation cannot be created for any other combination.

How to do this in sql server?

Answer 1

Thanks all,

I solved the problem with stored procedure and checked the required condition during insert and update