Why this Where condition returns 0 Rows? - sql

Question

SELECT
*
FROM tblName
WHERE mode = '1' AND (category = #Category OR #Category = 'all' OR NewsId = #Category)
I passed #Category='all'. This returns 0 rows. If OR NewsId=#Category this condition not added, query will return all results

Answer 1

Try this one -
mode = '1'
AND
(
#Category = 'all'
OR
#Category IN (category, CAST(NewsId AS VARCHAR(10)))
)
Do not use too large data-type length (i mean MAX):
CREATE TABLE dbo.TBL_ContentsPage
(
NewsId INT IDENTITY(1001,1) NOT NULL PRIMARY KEY
, Header NVARCHAR(1024) NULL
, SmallImage IMAGE NULL
, TextContent NVARCHAR(2048) NULL
, PostedDate DATETIME NOT NULL DEFAULT(GETDATE())
, mode VARCHAR(50) NULL
, [status] VARCHAR(50) NULL
, category VARCHAR(200) NULL
, author NVARCHAR(1024) NULL
, imgRefID VARCHAR(50) NULL
)
ALTER PROCEDURE [dbo].[SPGetArticlePaging]
(
#startposition INT
, #stopposition INT
, #Category VARCHAR(200)
)
AS BEGIN
SELECT
NewsId
, Header
, TextContent
, author
, PostedDate
, category
, imgRefID
FROM (
SELECT
NewsId
, Header
, TextContent
, author
, PostedDate
, category
, DateRank = ROW_NUMBER() OVER(ORDER BY PostedDate DESC)
, imgRefID
FROM dbo.TBL_ContentsPage
WHERE mode = '1'
AND
(
#Category = 'all'
OR
#Category IN (category, CAST(NewsId AS VARCHAR(10)))
)
) t
WHERE DateRank BETWEEN #startposition AND #stopposition
RETURN 0
END