1.    On the Start menu, click All Programs.

2.    Click Microsoft SharePoint 2010 Products.

3.    Click SharePoint 2010 Management Shell.

4.    At the Windows PowerShell command prompt, type the appropriate command.

Mount-SPContentDatabase "<ContentDb>" -DatabaseServer "<DbServer>" -WebApplication http://SiteName

Where:

·       <ContentDb> is the content database to be attached.

·       <DbServer> is the name of the database server.

·       http://SiteName is the name of the Web application to which the content database is being attached.