获取每个数据库的上次完整备份和事务日志备份

Question

如何使用系统表“backupset”和相关备份表编写脚本或查询，以显示每个生产服务器上每个数据库的上次完整备份和上次日志备份。

Answer 1

这样的事情应该让你得到你正在寻找的输出。以下查询为每个数据库提取完整、差异或日志备份类型的最新备份。

;with backup_cte as
(
    select
        database_name,
        backup_type =
            case type
                when 'D' then 'database'
                when 'L' then 'log'
                when 'I' then 'differential'
                else 'other'
            end,
        backup_finish_date,
        rownum = 
            row_number() over
            (
                partition by database_name, type 
                order by backup_finish_date desc
            )
    from msdb.dbo.backupset
)
select
    database_name,
    backup_type,
    backup_finish_date
from backup_cte
where rownum = 1
order by database_name;

Answer 2

如果您对该表的更多详细信息感兴趣，我在这里写了一篇关于使用备份集的文章。尽管这里是一个查询来拉出你想要的东西。

use msdb
go

-- D = Full, I = Differential and L = Log.
-- There are other types of backups too but those are the primary ones.
SELECT backupset.database_name, 
    MAX(CASE WHEN backupset.type = 'D' THEN backupset.backup_finish_date ELSE NULL END) AS LastFullBackup,
    MAX(CASE WHEN backupset.type = 'I' THEN backupset.backup_finish_date ELSE NULL END) AS LastDifferential,
    MAX(CASE WHEN backupset.type = 'L' THEN backupset.backup_finish_date ELSE NULL END) AS LastLog
FROM backupset
GROUP BY backupset.database_name
ORDER BY backupset.database_name DESC

注意：有人提到我加入了backmediaset，不需要。这是真的，我只能假设我忘记从链接中的原始查询中删除它。我已经从这里删除了它。

Answer 3

您可能想查看msdb数据库以了解这些详细信息。

例如：

DECLARE @DBName SYSNAME;
SET @DBName = DB_NAME(); -- modify these as you desire.
SET @DBName = NULL; -- comment this line if you want to limit the displayed history

SELECT DatabaseName = bs.database_name
    , BackupStartDate = bs.backup_start_date
    , CompressedBackupSize = bs.compressed_backup_size
    , ExpirationDate = bs.expiration_date
    , BackupSetName = bs.name
    , RecoveryModel = bs.recovery_model
    , ServerName = bs.server_name
    , BackupType = CASE bs.type 
        WHEN 'D' THEN 'Database' 
        WHEN 'L' THEN 'Log' 
        ELSE '[unknown]' END
    , LogicalDeviceName = bmf.logical_device_name
    , PhysicalDeviceName = bmf.physical_device_name
FROM msdb.dbo.backupset bs
    INNER JOIN msdb.dbo.backupmediafamily bmf 
        ON [bs].[media_set_id] = [bmf].[media_set_id]
WHERE (bs.database_name = @DBName
    OR @DBName IS NULL)
    AND bs.type = 'D'
ORDER BY bs.backup_start_date DESC;