SQL server 数据库日志文件过大清空日志文件

SQL2008:
'在SQL2008中清除日志就必须在简单模式下进行，等清除动作完毕再调回到完全模式。

 USE [master]
 GO
 ALTER DATABASE DBName SET RECOVERY SIMPLE WITH NO_WAIT
 GO
 ALTER DATABASE DBName SET RECOVERY SIMPLE --简单模式
 GO
 USE DBName
 GO
 DBCC SHRINKFILE (N'DBName_Log' , 11, TRUNCATEONLY) 

 GO

 USE [master]
 GO
 ALTER DATABASE DBName SET RECOVERY FULL WITH NO_WAIT
 GO
 ALTER DATABASE DBName SET RECOVERY FULL --还原为完全模式
 GO