SQL ignore part of WHERE if parameter is null

Question

I have a stored procedure that fetches info from a table based on 4 parameters.

I want to get values based on the parameters, but if a parameter is NULL then that pa

Answer 1

This will work and easier to understand, at least for me. The IIF statement is only available in SQL Server 2012 and up, you can replace it with a case statement.

SELECT Id, col1, col2, ... 
FROM    myTable 
WHERE   condition1 = IIF(col1 IS NULL, col1, @Param1)
AND     condition2 = IIF(col2 IS NULL, col2, @Param2)...