缩小SQL Server日志文件的SQL语句

把下面的代码粘贴到SQL Query Analyzer（查询分析器）里执行即可（注意修改红色部分的3个参数）：

SET NOCOUNT ONDECLARE @LogicalFileName sysname,@MaxMinutes INT,@NewSize INT

USE Dicky  --需要缩小日志的数据库名SELECT @LogicalFileName = 'Dicky_Log',  --日志文件的逻辑名，非物理文件名@MaxMinutes = 10, -- Limit on time allowed to wrap log.@NewSize = 2 --需要重新设定的日志文件的大小(单位:M)，此值必须小于原先文件大小

-- Setup / initializeDECLARE @OriginalSize intSELECT @OriginalSize = size FROM sysfilesWHERE name = @LogicalFileNameSELECT 'Original Size of ' + db_name() + ' LOG is ' + CONVERT(VARCHAR(30),@OriginalSize) + ' 8K pages or ' + CONVERT(VARCHAR(30),(@OriginalSize*8/1024)) + 'MB'FROM sysfilesWHERE name = @LogicalFileNameCREATE TABLE DummyTrans(DummyColumn char (8000) not null)

DECLARE @Counter INT,@StartTime DATETIME,@TruncLog VARCHAR(255)SELECT @StartTime = GETDATE(),@TruncLog = 'BACKUP LOG ' + db_name() + ' WITH TRUNCATE_ONLY'

DBCC SHRINKFILE (@LogicalFileName, @NewSize)EXEC (@TruncLog)-- Wrap the log if necessary.WHILE @MaxMinutes > DATEDIFF (mi, @StartTime, GETDATE()) -- time has not expiredAND @OriginalSize = (SELECT size FROM sysfiles WHERE name = @LogicalFileName) AND (@OriginalSize * 8 /1024) > @NewSize BEGIN -- Outer loop.SELECT @Counter = 0WHILE ((@Counter < @OriginalSize / 16) AND (@Counter < 50000))BEGIN -- updateINSERT DummyTrans VALUES ('Fill Log') DELETE DummyTransSELECT @Counter = @Counter + 1END EXEC (@TruncLog) END SELECT 'Final Size of ' + db_name() + ' LOG is ' +CONVERT(VARCHAR(30),size) + ' 8K pages or ' + CONVERT(VARCHAR(30),(size*8/1024)) + 'MB'FROM sysfiles WHERE name = @LogicalFileNameDROP TABLE DummyTransSET NOCOUNT OFF