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Remove Database Mirroring (SQL Server)

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Applies to: SQL Server

This topic describes how to remove database mirroring from a database in SQL Server by using SQL Server Management Studio or Transact-SQL. At any time, the database owner can manually stop a database mirroring session by removing mirroring from the database.

In This Topic

Before You Begin

Security

Permissions

Requires ALTER permission on the database.

Using SQL Server Management Studio

To remove database mirroring

  1. During a database mirroring session, connect to the principal server instance, in Object Explorer, click the server name to expand the server tree.

  2. Expand Databases, and select the database.

  3. Right-click the database, select Tasks, and then click Mirror. This opens the Mirroring page of the Database Properties dialog box.

  4. In the Select a Page pane, click Mirroring.

  5. To remove mirroring, click Remove Mirroring. A prompt asks for confirmation. If you click Yes, the session is stopped and mirroring is removed from the database.

Using Transact-SQL

To remove database mirroring, use the Database Properties. use the Mirroring page of the Database Properties dialog box.

To remove database mirroring

  1. Connect to the Database Engine of either mirroring partner.

  2. From the Standard bar, click New Query.

  3. Issue the following Transact-SQL statement:

    ALTER DATABASE database_name SET PARTNER OFF

    where database_name is the mirrored database whose session you want to remove.

    The following example removes database mirroring from the AdventureWorks2022 sample database.

    ALTER DATABASE AdventureWorks2022 SET PARTNER OFF;

Follow Up: Removing Database Mirroring

Note

For information about the impact of removing mirroring, see Removing Database Mirroring (SQL Server).

  • If you intend to restart mirroring on the database

    Any log backups taken on the principal database after mirroring was removed must all be applied to the mirror database before you can restart mirroring.

  • If you do not intend to restart mirroring

    Optionally, you can recover the former mirror database. On the server instance that was the mirror server, you can use the following Transact-SQL statement:

    RESTORE DATABASE database_name WITH RECOVERY;

    Important

    If you recover this database, two divergent databases with the same name are online. Therefore, you need to ensure that clients can access only one of them-typically the most recent principal database.

Related Tasks

See Also

Database Mirroring (SQL Server)
Setting Up Database Mirroring (SQL Server)
Always On Availability Groups (SQL Server)