Delete Multiple rows in once

Question

4.00/5 (1 vote)

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Hello frnds,

SQL

CREATE PROCEDURE [dbo].[usp_DeleteDrafsMessages]
(
@DraftsDelID VARCHAR(500)
)
AS
BEGIN 
	IF (@DraftsDelID <> '')
	BEGIN 
		DELETE FROM tblMessage where MessageID= dbo.udfSplit(@DraftsDelID,',')
		
	END

END

I want to delete multiple number of rows in once ,i have number of id in my string
@DraftsDelID,i willl get each id by dbo.udfSplit(@DraftsDelID,','),but my above code is not feasible ,plz help me out fast !

[Digimanus: added PRE tags]

Posted 6-Mar-12 23:33pm

JayantiChauhan

Updated 6-Mar-12 23:35pm

Herman<T>.Instance

v3

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Comments

Herman<T>.Instance 7-Mar-12 5:40am

Your biggest problem is dat MessageID is not unique. Does table tblMessage have a unique field?

3 solutions

Solution 1

Try something along these lines:

SQL

DECLARE @INSTR as VARCHAR(MAX)
SET @INSTR = '2,3,177,'
DECLARE @SEPERATOR as VARCHAR(1)
DECLARE @SP INT
DECLARE @VALUE VARCHAR(1000)
SET @SEPERATOR = ','
CREATE TABLE #tempTab (id int not null)
WHILE PATINDEX('%' + @SEPERATOR + '%', @INSTR ) <> 0 
BEGIN
   SELECT  @SP = PATINDEX('%' + @SEPERATOR + '%',@INSTR)
   SELECT  @VALUE = LEFT(@INSTR , @SP - 1)
   SELECT  @INSTR = STUFF(@INSTR, 1, @SP, '')
   INSERT INTO #tempTab (id) VALUES (@VALUE)
END
DELETE FROM myTable WHERE id IN (SELECT id FROM #tempTab)
DROP TABLE #tempTab

Posted 6-Mar-12 23:36pm

OriginalGriff

Comments

JayantiChauhan 7-Mar-12 5:49am

MessageID is unique !

Solution 2

The structure to delete double or more occurences is to number the occurences.
You miss a real unique field that you should add in the example I give below.

SQL

CREATE PROCEDURE [dbo].[usp_DeleteDrafsMessages]
(
@DraftsDelID VARCHAR(500)
)
AS
BEGIN 
	IF (@DraftsDelID <> '')
	BEGIN 
		Declare @MessageID varchar(max)
		set @MessageID = dbo.udfSplit(@DraftsDelID,',')
		SELECT Rowno,MessageID, UniqueID
		INTO #TEMP
		FROM
		(
			SELECT Row_Number() over (partition by MessageID order by MessageID) as Rowno, MessageID, UniqueID
			FROM tbl_Message
		) as t
		
		DELETE FROM tblMessage where UniqueID in (select UniqueID from #temp where Rowno > 1)
		DROP TABLE #temp
	END
 
END

Posted 6-Mar-12 23:41pm

Herman<T>.Instance

Updated 6-Mar-12 23:42pm

v2

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JayantiChauhan · Accepted Answer · 2012-03-07T00:01:00

Solution 3

Hello frnds,
Solution:-:)
CREATE PROCEDURE [dbo].[usp_DeleteDrafsMessages]
(
@DraftsDelID VARCHAR(500)
)
AS
BEGIN
IF (@DraftsDelID <> '')
BEGIN
DELETE FROM tblMessage where MessageID in (select ListMember from dbo.udfSplit(@DraftsDelID,','))

END

END
:)

Posted 7-Mar-12 0:01am

JayantiChauhan

v2