Question

I’m on SQL Server 2005 and I am getting an error which I am pretty sure should not be getting.

Msg 512, Level 16, State 1, Procedure spGetSavedSearchesByAdminUser, Line 8 Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression. 

I am following the example# B on this MSDN link.

My stored proc code is as follows. I can simplify it for the sake of this post if you request so:

ALTER PROCEDURE [dbo].[spGetSavedSearchesByAdminUser]      @strUserName varchar(50)       ,@bitQuickSearch bit = 0 AS  BEGIN      SELECT [intSearchID] ,strSearchTypeCode ,[strSearchName]     FROM [tblAdminSearches]       WHERE          strUserName = @strUserName         AND          strSearchTypeCode              IN (                 CASE @bitQuickSearch                  WHEN 1 THEN 'Quick'                  ELSE (SELECT strSearchTypeCode FROM tblAdvanceSearchTypes)                  END             )      ORDER BY strSearchName END 

I have checked there is no datatype mismatch between the resultset from the subquery and the strSearchTypeCode the subquery result is compared with.

I see no reason why this should not work. If you have any clues then please let me know.

Answer 1

Try rearranging the query so that the boolean expression occurs inside the subselect, e.g.

ALTER PROCEDURE [dbo].[spGetSavedSearchesByAdminUser]      @strUserName varchar(50)       ,@bitQuickSearch bit = 0 AS  BEGIN      SELECT [intSearchID] ,strSearchTypeCode ,[strSearchName]     FROM [tblAdminSearches]       WHERE          strUserName = @strUserName         AND          strSearchTypeCode                  IN (SELECT strSearchTypeCode FROM tblAdvanceSearchTypes where @bitQuickSearch=0                     UNION                     SELECT 'Quick' AS strSearchTypeCode WHERE @bitQuickSearch=1)      ORDER BY strSearchName END