how to lock and unlock table

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SQL-Server-2008

How can I lock and unlock the table according to my requirements.

my application is performing transaction.
I need that till completion of my one transaction.no other one can perform any other transaction.or not see the select query result.

basically I want to know how to lock and unlock the table?

Posted 29-May-12 2:28am

prince_rumeel

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3 solutions

Solution 1

You need to be aware of SQL's isolation levels.

Secondly SQL by default uses locks for transaction isolation. This means that any queries that are executed against the server are held until the locks are released.

http://msdn.microsoft.com/en-us/library/ms173763.aspx[^]

As far as your application, If you are using ADO.NET for example you should take a look at this from MSDN:

http://msdn.microsoft.com/en-us/library/ms189542(v=sql.105).aspx[^]

Posted 29-May-12 2:42am

db7uk

Solution 3

http://msdn.microsoft.com/en-US/library/ms187373.aspx[^]

Here is the complete documentation about it.which can help in a batter way

Posted 29-May-12 2:55am

prince_rumeel

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Ganga Patangi · Accepted Answer · 2012-05-29T02:44:00

Solution 2

TABLOCK - Use a table lock when reading or modifying data

UPDATE Products WITH (TABLOCK )
SET ProductCat = 'Machine';
WHERE ProductSubCat = 'Mac'';

For more information you can use this link-
http://blog.sqlauthority.com/2007/04/27/sql-server-2005-locking-hints-and-examples/

Posted 29-May-12 2:44am

Ganga Patangi