恢复比较早的备份文件 restore database OA from disk='C:\20080527.bak' with norecovery
根据日志文件，回复到数据错误前一个时间点 restore log mytext from disk='E:\20080528.bak'//此为日志备份文件 with stopat='05/28/2008 7:00:00'
