sql2005清空日志语句
Backup Log DbName WITH no_log GO DUMP TRANSACTION DbName WITH no_log GO USE DbName DBCC SHRINKFILE (2) GO
sql2008,sql2012清空日志语句
ALTER DATABASE DbName SET RECOVERY SIMPLE WITH NO_WAIT ALTER DATABASE DbName SET RECOVERY SIMPLE DBCC SHRINKFILE (N‘DbName_Log‘ , 11, TRUNCATEONLY) ALTER DATABASE DbName SET RECOVERY FULL WITH NO_WAIT ALTER DATABASE DbName SET RECOVERY FULL
原文：http://www.cnblogs.com/liaohuolin/p/4571877.html