sql 日志文件截断收缩

use mydb
ALTER DATABASE mydb SET RECOVERY SIMPLE WITH NO_WAIT
ALTER DATABASE mydb SET RECOVERY SIMPLE   --简单模式
DBCC SHRINKFILE (N'mydb_Log' , 11, TRUNCATEONLY)   -- 11是大小  11M
ALTER DATABASE mydb SET RECOVERY FULL WITH NO_WAIT
ALTER DATABASE mydb SET RECOVERY FULL  --还原为完全模式

SELECT dbf.file_id AS FileID

    , dbf.name AS [FileName]

    , s.filename AS FileLocation

    , CAST(dbf.size/128.0 AS DECIMAL(19,2)) AS FileSizeMB

    , CAST(CAST(FILEPROPERTY(dbf.name, 'SpaceUsed') AS int)/128.0 AS DECIMAL(19,2)) AS SpaceUsedMB

    , CAST(dbf.size/128.0 - CAST(FILEPROPERTY(dbf.name, 'SpaceUsed') AS int)/128.0 AS DECIMAL(19,2)) AS AvailableSpaceMB

    , CAST((dbf.size / 128.0 - (FILEPROPERTY(dbf.name, 'SpaceUsed') / 128.0)) / (dbf.size / 128.0) * 100 AS DECIMAL(19,2)) AS [%FreeSpace]

    , dbf.growth / 128 AS FileGrowthMB

    , f.name AS FilegroupName

FROM sys.database_files dbf

    INNER JOIN sys.sysfiles s ON dbf.name = s.name

    LEFT JOIN sys.filegroups f ON dbf.data_space_id = f.data_space_id

ORDER BY dbf.name;