USE[master]
    GO
    ALTER DATABASE db_Name SET RECOVERY SIMPLE WITH NO_WAIT
    GO
    ALTER DATABASE db_Name SET RECOVERY SIMPLE   --简单模式
    GO
    USE db_Name 
    GO
    DBCC SHRINKFILE (N'db_Name_log' , 11, TRUNCATEONLY)
    GO
    USE[master]
    GO
 
 
    ALTER DATABASE db_Name SET RECOVERY FULL WITH NO_WAIT
    GO
 
 
    ALTER DATABASE db_Name SET RECOVERY FULL  --还原为完全模式
 
 
    GO