SQL Server误删表恢复
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SQL Server 完全恢复模式 下恢复误删除的表,进行 精准 恢复
1. 找出被删除的表名(无schema,能找到schema的分享下)、object_id、表所在数据库、删除人、删除时间等
declare @database_name varchar(200),@type varchar(2),@pass_hours int, select @database_name='AdventureWorks2014',@pass_hours=-48 declare @file_path sql_variant select @file_path=value from fn_trace_getinfo(0) where property=2 and traceid=1 SELECT max(gt.HostName) as 'LoginHostName' ,max(gt.ApplicationName) as 'ApplicationName' ,max(gt.LoginName) as 'LoginName' ,min(gt.StartTime) as 'MinStartTime' ,max(gt.StartTime) as 'MaxStartTime' ,gt.ObjectID ,max(gt.ServerName) as 'DBServerName' ,max(gt.ObjectName) as 'ObjectName' ,max(gt.DatabaseName) as 'DatabaseName' ,max(sv.subclass_name) as 'subclass_name' ,max(e.name) as 'OperationType' FROM fn_trace_gettable(convert(varchar(2000),@file_path), DEFAULT) gt LEFT JOIN sys.trace_subclass_values sv ON gt.[eventclass] = sv.[trace_event_id] AND sv.[subclass_value] = gt.[objecttype] INNER JOIN sys.trace_events e ON gt.[eventclass] = e.[trace_event_id] INNER JOIN sys.trace_categories c ON e.[category_id] = c.[category_id] WHERE StartTime>=dateadd(HOUR,@pass_hours,getdate()) and StartTime<=getdate() and [eventclass]=47 --drop talbe/index and [email protected]_name and subclass_name='U' group by gt.ObjectID
2. 通过删除时间确定相关信息被记录在哪个日志文件上
select * from msdb.dbo.backupmediafamily where media_set_id=( select top 1 media_set_id from msdb.dbo.backupset where [email protected]e_name and backup_finish_date>[email protected]_start_time and type='L' order by backup_finish_date)
3. 从日志文件提取lsn相关信息
declare @lockinfo varchar(100) set @lockinfo='%SCH_M OBJECT%:'[email protected]+':%',[Begin Time] select [Transaction id],'lsn:0x'+[Current LSN] from fn_dump_dblog ( NULL, NULL, N'DISK', 1, @backupfile, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT) as a where convert(datetime,[Begin Time]) between dateadd(ss,-5,@min_start_time) and dateadd(ss,5,@max_start_time) and [Transaction Name]='DROPOBJ' and exists(select 1 from fn_dump_dblog ( NULL, NULL, N'DISK', 1, @backupfile, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT) where [Transaction id]=a.[Transaction id] and [Lock Information] like @lockinfo)
4. 恢复所需相关信息
5. 邮件显示
6. 恢复语句(最后执行的一句)
Restore log DBName from disk='xxx' with stopbeforemark='xxx'
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