Please start any new threads on our new site at We've got lots of great SQL Server experts to answer whatever question you can come up with.

Our new SQL Server Forums are live! Come on over! We've restricted the ability to create new threads on these forums.

SQL Server Forums
Profile | Active Topics | Members | Search | Forum FAQ
Register Now and get your question answered!
Save Password
Forgot your Password?

 All Forums
 SQL Server 2012 Forums
 SQL Server Administration (2012)
 Query on blocking on a shared and exclusive lock
 Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

Starting Member

9 Posts

Posted - 08/06/2013 :  09:22:27  Show Profile  Reply with Quote

I have been doing some research on locks and isolation levels within sql server. From my understanding an exclusive lock will block a request to a shared lock. So if an update is being carried out on a table and another session attempts to carry out a select 7query on the same table, then it will block the select until the update has been carried out (this is Assuming we use read committed isolation).
Is this correct?

Very Important crosS Applying yaK Herder

52326 Posts

Posted - 08/06/2013 :  09:30:11  Show Profile  Reply with Quote
yes it is on the data where exclusive lock is held so that the selects have to wait until update task completes its operation and releases the acquired locks.

SQL Server MVP
Go to Top of Page
  Previous Topic Topic Next Topic  
 Reply to Topic
 Printer Friendly
Jump To:
SQL Server Forums © 2000-2009 SQLTeam Publishing, LLC Go To Top Of Page
This page was generated in 0.04 seconds. Powered By: Snitz Forums 2000