One:
he backup set holds a backup of a database other than the existing ‘xxdb’ database
Restore failed for Server ‘ SQL Server name ‘. (Microsoft.SqlServer.Smo)
Additional information:
System.Data.SqlClient.SqlError: The backup set holds a backup of a database other than the existing ‘ xxdbe ‘ database. (Microsoft.SqlServer.Smo)
Above error message indicates that you are going to restore a database on another database which are not the same database. For example, you have backup A database and try to restore the backup to B database, the error will occur.
You can use the overwrite the existing database option while you’re restoring to solve the problem.
On Restore Database , select Options tab on the left menu. Then, check Overwrite the existing database on Restore options.
Now Restore the database. and problem is solved.
You can also delete the database and again restore that.
Use SQL to solve this issue.
USE master
RESTORE DATABASE ReportServer
FROM DISK = ‘C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQL\Backup\ReportServer.bak‘
WITH MOVE ‘ReportServer_db‘ TO ‘C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQL\Backup\ReportServer.mdf‘ ,
MOVE ‘ReportServer_log‘ TO ‘C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQL\Backup\ReportServer_log.ldf‘ ,
STATS = 10 , REPLACE
GO
原文：http://www.cnblogs.com/yemaxu/p/4093220.html