查看数据库备份情况

一般我们想了解一个数据库是否曾经备份过，或者最后一次备份是什么时候，这个时候有两种方法可以查看：

方法一，通过界面方式,选中数据库右键点击属性，在常规选项就可以看到上一次数据和日志备份的时间。

方法二：第一种方法很直观操作也很简单，但是这种方法存在局限性，每次只能看一个库，那第二种方法是可以查看某个实例下的所有数据库的备份情况。

 
-------------------------查询某个实例下所有数据库最近一次备份的时间---------------------------------
;with CTE_Last_Full_Backup(database_name,backup_start_date,rank)
as(
   select database_name,backup_start_date
   ,rank()over(partition by database_name order by backup_start_date desc) as rank
   from msdb.dbo.backupset
   where type='D'  --type='D'表示全备份，而type='L'表示日志备份，至于差异备份，则是type='I'。
)
,CTE_Last_Log_Backup(database_name,backup_start_date,rank)
as(
   select database_name,backup_start_date
   ,rank()over(partition by database_name order by backup_start_date desc) as rank
   from msdb.dbo.backupset
   where type='L'
)
,CTE_Last_diff_Backup(database_name,backup_start_date,rank)
as(
    select database_name,backup_start_date
    ,rank()over(partition by database_name order by backup_start_date desc) as rank
     from msdb.dbo.backupset
    where type='L=I'
)

select d.name as database_name,
f.backup_start_date as last_full_backup,
l.backup_start_date as last_log_backup,
c.backup_start_date as Last_diff_backup_time 
,recovery_model_desc
from sys.databases as d
left join CTE_Last_Full_Backup as f on d.name=f.database_name and f.rank=1
left join CTE_Last_Log_Backup as l on d.name=l.database_name and l.rank=1
left join CTE_Last_diff_Backup as c on d.name=c.database_name and c.rank=1 
order by d.name

--------------------------查看某个数据库的备份历史信息------------------------------------------------------
select top 100
database_name,
database_creation_date,
backup_start_date,
backup_finish_date,
case when type='D' then 'full_backup'
     when type='L' then 'log_backup'
     when type='I' then 'differental_backup'
     else 'NULL'
     end  as backup_type,
(backup_size/1024.0/1024.0) as [backup_size(MB)],
(compressed_backup_size/1024.0/1024.0) as  [compressed_backup_size(MB)],
[user_name]
from msdb.dbo.backupset with(nolock)
where database_name='IPP3_History'
order by  backup_start_date desc

 方法三：exec sp_readerrorlog 通过查看日志，查看是否有备份的记录。