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如何縮小SQL數據庫日記的大小

2013-11-15 14:36:05  來源: SQL Server 

  以下是引用片段
  縮小SQL數據庫日記的大小
  
  一般情況下當SQL數據庫日記文件太大時很難將其壓縮到更小
  通過下面的這段批處理SQL程序序就可以實現了(試用通過!!!)
  注修改下面的三個備注處的參數即可COPY到查詢分析器裡執行了
  
  SET NOCOUNT ON
  DECLARE @LogicalFileName sysname
  @MaxMinutes INT
  @NewSize INT
  
  USE dvbbs 要操作的數據庫名
  SELECT @LogicalFileName = dvbbs_log 日志文件名
  @MaxMinutes = Limit on time allowed to wrap log
  @NewSize = 你想設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
From:http://tw.wingwit.com/Article/program/SQLServer/201311/22048.html
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