Comments on: Isolation Levels in SQL Server 2005 http://www.sql-server-performance.com/2007/isolation-levels-2005/ SQL Server Performance Tuning Fri, 17 May 2013 13:31:24 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: Malik Waheed Tahir http://www.sql-server-performance.com/2007/isolation-levels-2005/#comment-1093 Malik Waheed Tahir Thu, 22 Dec 2011 12:21:09 +0000 http://www.sql-server-performance.com/?=970#comment-1093 As per your article,dirty reads can happen in “Read uncommitted” but not in “Read Committed Snapshot”.

But after reading this article , if you see the example given in “Read Committed Snapshot”.
begin tran — in connection 1
UPDATE dbo.Employees
SET HireDate = ’5/2/1992?
WHERE EmployeeID = 1

In connection 1 hiredate will be changed to ’5/2/1992?but in connection 2 when I select from the table it still shows the old hiredate.Is this not the same as Read Uncommitted? then why in the above table, it is mentioned that all the concurrency related problems except dirty reads can happen in “Read Committed Snapshot”.Please clarify this.

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