SQL Server 2008 R2 Compatibility Levels

There was no change to the compatibility levels between SQL Server 2008 and SQL Server 2008 R2.

SQL Server can run in a number of different compatibility levels, but how do you change it and how do you set it. These compatibility levels reflect the version of SQL server.

• 60 = SQL Server 6.0
• 65 = SQL Server 6.5
• 70 = SQL Server 7.0
• 80 = SQL Server 2000
• 90 = SQL Server 2005
• 100 = SQL Server 2008 and SQL Server 2008 R2

Changing the compatibility level in SQL Server may change the behavior of specific of the functionality of the SQL Server. Be sure to research and test before changing compatibility levels.

Sp_dbcmptlevel dbname
GO
Sp_dbcmptlevel dbname, 100
GO
Sp_dbcmptlevel dbname
GO

This TSQL will generate the following output:

The current compatibility level is 90.
The current compatibility level is 100.

Once you change the compatibility level, you will want to be sure that your system still runs correctly.

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