I have an application that creates a query string that I use to search a SQL SERVER 2008 EXPRESS database. Most of the code is to create the WHERE clause of the query.
With much help from some of the experts here I have created a stored procedure that takes the string of the WHERE clause as an input and returns the desired results. While doing this I stumbled across the function COALESCE.
From my understanding I should be able to produce a SP (using COALESCE or ISNULL) that will create the entire search query for me with relatively little code. Removing the need for most of the code that I am currently using in my app.
Below is the SQL code using COALESCE that I am trying to get to work. My test results for this code along with the errors are attached (testresults.xls).
Basically I am trying to create a stored procedure that will take the text entered in text and or listboxes and return the records based on that search. Much like the advance search of EE.
Thank you for any and all help.
/****** Object: StoredProcedure [dbo].[usp_SearchResults2] Script Date: 09/01/2010 22:40:27 ******/
SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
-- Create date: 8/29/2010
ALTER PROCEDURE [dbo].[usp_SearchResults2]
-- Add the parameters for the stored procedure here
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
--Insert statements for procedure here
SET @Item = SUBSTRING(@Item,0,6)
Item_Number LIKE '%' + COALESCE(@Item,Item_Number) + '%' AND
ProdLine LIKE '%' + COALESCE(@ProdLine,ProdLine) + '%' AND
Document_Type = COALESCE(@Document_Type,Document_Type)