To set a variable value in SQL server based on true / false result, CASE statements can be used.
DECLARE @pdId int SET @pdId = 31 DECLARE @isExists varchar(55) SET @isExists = CASE WHEN EXISTS (SELECT PersonalDetailsId FROM Accounts WHERE PersonalDetailsId = @pdId) THEN 'Accounts detials exists.' WHEN EXISTS (SELECT PersonalDetailsId FROM PersonalDetails WHERE PersonalDetailsId = @pdId) THEN 'Personal Details Exists but Accounts Details do not' ELSE 'N/A' END; print @isExists
In above case, the value of @pdId is 31 that exists in the Accounts table and the value of the @isExists variable is set to ‘Accounts details exists’.
When the value of @pdId is 44 that doesn’t exists in the Accounts table but it exists in PersonalDetails table, the value of @isExists is set to ‘Personal Details Exists but Accounts Details do not‘.
If the @pdId is set to something that neither exists in the PersonalDetails table and Accounts table, @isExists value is set to ‘N/A’.
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