sql server 清理日志存储过程

代码ALTER PROC [dbo].[CleanTranLog]
AS
BEGIN
DECLARE @num TINYINT --执行次数
DECLARE @backLogName VARCHAR(100) ;--备份日志文件名称
DECLARE @backLogPath VARCHAR(100) ; --备份日志文件的路径
SET @num = 0 ;
SET @backLogPath = N'C:\SQLBackup' ;--设定备份日志的路径
--备份3次镜像日志文件，同时删除
WHILE( @num < 3 )
BEGIN
DECLARE @LogPath VARCHAR(100)
SET @backLogName = CAST(@num as VARCHAR(2)) + '.trn' ;
SET @LogPath = @backLogPath + '\' + @backLogName
BACKUP LOG Mirror TO DISK = @LogPath WITH NOFORMAT, NOINIT,
NAME= @backLogName, SKIP, REWIND, NOUNLOAD,STATS = 10
SET @num = @num + 1
--删除刚备份的trn日志文件结束的备份日志文件
EXECUTE master.dbo.xp_delete_file 0, @LogPath ;
end
--收缩日志文件到200M
DBCC SHRINKFILE (mirror_Log, 2) ;
END