How to: View or Change the Compatibility Level of a Database (SQL Server Management Studio)
This topic explains how to view or change the compatibility level of a database.
To view or change the compatibility level of a database
- After connecting to the appropriate instance of the SQL Server Database Engine, in Object Explorer, click the server name to expand the server tree. 
- Expand Databases, and, depending on the database, either select a user database or expand System Databases and select a system database. 
- Right-click the database, and then click Properties. - The Database Properties dialog box opens. 
- In the Select a page pane, click Options. - The current compatibility level is displayed in the Compatibility level list box. 
- To change the compatibility level, select a different option from the list. The choices are SQL Server 2000 (80), SQL Server 2005 (90), or SQL Server 2008 (100). - Important - Before changing the compatibility level of a database, you should understand the impact of the change on your applications. For more information, see ALTER DATABASE Compatibility Level (Transact-SQL).