How to update a Records in Sql Server at same time on the same records by two user

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SQL-Server-2005

.NET3.5

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How to update a Records in Sql Server at same time on the same records by two user ?

Posted 18-Feb-10 19:15pm

Ganesh_verma

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Adesina Mark · Answer 1 · 2010-03-05T01:29:00

The best practice is Transaction.

So use transaction.

Check this out:

CREATE PROCEDURE InsertRecords
(
@parameter1 varchar (50),
@parameter2 varchar (50),
.
.

@parametern varchar(50)
)
AS
BEGIN

BEGIN TRANSACTION
BEGIN TRY
INSERT INTO [tablename]
(Field1,Field2,......Fieldn)
VALUES
(@parameter1,@parameter2,......@parametern)

COMMIT TRANSACTION
END TRY
BEGIN CATCH
ROLLBACK TRANSACTION
SELECT ERROR_NUMBER() AS ErrorNumber,ERROR_MESSAGE() AS ErrorMessage
END CATCH
END

If any of the two users request fails, it will roll back and ask the user to resubmit his/her request.

Hope this helps.

Rod Kemp · Answer 2 · 2010-02-21T15:24:00

Solution 1

Short answer is you can't.

If two users/processes try to update the same data at the same time a deadlock will occur, when this happens one of the processes will be chosen as the victim and will fail. What you need to do is catch this error (error code 1205) and retry the command again.

Posted 21-Feb-10 15:24pm

Rod Kemp

steeve_richard · Answer 3 · 2010-02-21T19:28:00

Solution 2

you can use multiple update queries..

like

first update query

seperated by ;(semicolon)

second update query

Posted 21-Feb-10 19:28pm

steeve_richard

Updated 21-Feb-10 19:29pm

v3