Question

When @RadioServiceGroup is set to NULL, I want to return all the records from the sbi_l_radioservicecodes table which has about 120 records. However, when I execute the following procedure and set the @RadioServiceGroup to NULL, it returns no records. Here is the stored proc:

CREATE PROCEDURE [dbo].[GetRadioServiceCodes]  @RadioServiceGroup nvarchar(1000) = NULL AS BEGIN IF(@RadioServiceGroup = NULL)     BEGIN         SELECT rsc.RadioService         FROM sbi_l_radioservicecodes rsc         END     ELSE     BEGIN                SELECT rsc.RadioService         FROM sbi_l_radioservicecodes rsc         WHERE rsc.RadioServiceGroup = @RadioServiceGroup         END END 

Answer 1

Try ‘IS NULL’ instead of ‘= NULL’