USE [master]

    GO

    ALTER DATABASE DNName SET RECOVERY SIMPLE WITH NO_WAIT

    GO

    ALTER DATABASE DNName SET RECOVERY SIMPLE   --简单模式

    GO

    USE DNName

    GO

    DBCC SHRINKFILE (N'DNName_Log' , 11, TRUNCATEONLY)

    GO

    USE [master]

    GO

    ALTER DATABASE DNName SET RECOVERY FULL WITH NO_WAIT

    GO

    ALTER DATABASE DNName SET RECOVERY FULL  --还原为完全模式