WHERE IS NULL, IS NOT NULL or NO WHERE clause depending on SQL Server parameter value

Question

I have a stored procedure in SQL Server 2000 that performs a search based on parameter values. For one of the parameters passed in, I need a different WHERE cla

Answer 1

WHERE MyColumn = COALESCE(@value,MyColumn) 

• If @value is NULL, it will compare MyColumn to itself, ignoring @value = no where clause.

• IF @value has a value (NOT NULL) it will compare MyColumn to @value.

Reference: COALESCE (Transact-SQL).