以下是引用片段
缩小SQL数据库日记的大小
一般情况下当SQL数据库日记文件太大时很难将其压缩到更小
通过下面的这段批处理SQL程序序就可以实现了（试用通过！！！）
注修改下面的三个备注处的参数即可COPY到查询分析器里执行了
SET NOCOUNT ON
DECLARE @LogicalFileName sysname
@MaxMinutes INT
@NewSize INT
USE dvbbs 要操作的数据库名
SELECT @LogicalFileName = dvbbs_log 日志文件名
@MaxMinutes = Limit on time allowed to wrap log
@NewSize = 你想设定的日志文件的大小(M)
Setup / initialize
DECLARE @OriginalSize int
SELECT @OriginalSize = size
FROM sysfiles
WHERE name = @LogicalFileName
SELECT Original Size of + db_name() + LOG is +
CONVERT(VARCHAR()@OriginalSize) + K pages or +
CONVERT(VARCHAR()(@OriginalSize*/)) + MB
FROM sysfiles
WHERE name = @LogicalFileName
CREATE TABLE DummyTrans
(DummyColumn char () not null)
DECLARE @Counter INT
@StartTime DATETIME
@TruncLog VARCHAR()
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 expired
AND @OriginalSize = (SELECT size FROM sysfiles WHERE name = @LogicalFileName)
AND (@OriginalSize * /) > @NewSize
BEGIN Outer loop
SELECT @Counter =
WHILE ((@Counter < @OriginalSize / ) AND (@Counter < ))
BEGIN update
INSERT DummyTrans valueS (Fill Log)
DELETE DummyTrans
SELECT @Counter = @Counter +
END
EXEC (@TruncLog)
END
SELECT Final Size of + db_name() + LOG is +
CONVERT(VARCHAR()size) + K pages or +
CONVERT(VARCHAR()(size*/)) + MB
FROM sysfiles
WHERE name = @LogicalFileName
DROP TABLE DummyTrans
SET NOCOUNT OFF
