USE dbname
GO
ALTER DATABASE dbname
SET RECOVERY SIMPLE;--设置简单恢复模式
GO
DBCC SHRINKFILE (dbname_Log, 1);
GO
ALTER DATABASE dbname
SET RECOVERY FULL;--恢复为原模式
GO
dbname为数据库名称
USE dbname
GO
ALTER DATABASE dbname
SET RECOVERY SIMPLE;--设置简单恢复模式
GO
DBCC SHRINKFILE (dbname_Log, 1);
GO
ALTER DATABASE dbname
SET RECOVERY FULL;--恢复为原模式
GO
dbname为数据库名称