I use this query in SQL Server 2008 R2 to restore
RESTORE DATABASE [DB1] FROM DISK = N'D:\new.bak' WITH RESTRICTED_USER, FILE = 1, NOUNLOAD, REPLACE, STATS = 10;
The following error is displayed:
Msg 3102, Level 16, State 1, Line 1
RESTORE cannot process database 'DB1' because it is in use by this session. It is recommended that the master database be used when performing this operation.
Msg 3013, Level 16, State 1, Line 1
RESTORE DATABASE is terminating abnormally.