You can attach a copied or detached SQL Server database. When you attach a SQL Server database that contains full-text catalog files onto a SQL Server server instance, the catalog files are attached from their previous location along with the other database files.
After detaching a SQL Server database, you can reattach it to the same or another instance of SQL Server. Attaching a database places it in exactly the same state that it was in when it was detached.
Note: We recommend that you do not attach or restore databases from unknown or untrusted sources.
To attach a database: