Building dynamic sql queries into a stored procedure

Microsoft SQL Server

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April 19th, 2008, 08:54 AM

pmillio

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Join Date: Nov 2007

Posts: 14

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Stored Procedures - Building dynamic sql queries into a stored procedure

Hi i have a page whereby the user can make a search based on three things, they are a textbox(userName), dropdownlist(subcategoryID), and region (regionID). The user does not have to select all three, he or she can enter a name into the textbox alone and make the search or enter a name into the textbox and select a dropdownlist value, my question is how can i build this procedure, I tried this but it didnt work;

Code:

ALTER PROCEDURE [dbo].[stream_UserFind] 

( 

@userName varchar(100),

@subCategoryID INT,

@regionID INT 

)
AS

declare @StaticStr nvarchar(5000)
set @StaticStr = 'SELECT DISTINCT SubCategories.subCategoryID, SubCategories.subCategoryName,
Users.userName ,UserSubCategories.userID
FROM Users INNER JOIN UserSubCategories ON Users.userID= UserSubCategories.userIDINNER JOIN
SubCategories ON UserSubCategories.subCategoryID = SubCategories.subCategoryID WHERE UserName like @UserName'

if(@subCategoryID <> 0)
 set @StaticStr = @StaticStr + ' and SubCategories.subCategoryID  = @subCategoryID '
if(@regionID <> 0)
 set @StaticStr = @StaticStr + ' and SubCategories.RegionId  = @regionID '

exec sp_executesql @StaticStr

)

April 27th, 2008, 01:35 AM

visakh16

Contributing User

Join Date: Dec 2007

Location: Trivandrum,Kerala

Posts: 32

Time spent in forums: 10 h 4 m
Reputation Power: 11

Code:

ALTER PROCEDURE [dbo].[stream_UserFind] 

( 

@userName varchar(100)=NULL,

@subCategoryID INT=NULL,

@regionID INT =NULL

)
AS

SELECT DISTINCT SubCategories.subCategoryID, SubCategories.subCategoryName,
Users.userName ,UserSubCategories.userID
FROM Users INNER JOIN UserSubCategories ON Users.userID= UserSubCategories.userIDINNER JOIN
SubCategories ON UserSubCategories.subCategoryID = SubCategories.subCategoryID 
WHERE (UserName like @UserName OR ISNULL(@UserName,'')='')
and (SubCategories.subCategoryID  = @subCategoryID OR ISNULL(@subCategoryID,'')='')
and (SubCategories.RegionId  = @regionID OR ISNULL(@regionID,'')='') 
GO

Make sure you pass '' or NULL as value from your form controls when user dont select a value from them.

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