T-SQL 查询上次完整备份的日期、大小和位置

Question

我使用下面的 T-SQL 查询来确定上次完整数据库备份的日期，并返回备份文件的大小和位置。我的问题是，对于没有备份或没有备份历史记录的数据库，它根本不会返回任何数据。理想情况下，我想修改查询以便返回所有数据库，无论它们是否有任何备份历史记录。任何人都可以建议如何修改以下查询以适应此情况？

WITH LastBackUp AS
(
SELECT  bs.database_name,
        bs.backup_size,
        bs.backup_start_date,
        bmf.physical_device_name,
        Position = ROW_NUMBER() OVER( PARTITION BY bs.database_name ORDER BY bs.backup_start_date DESC )
FROM  msdb.dbo.backupmediafamily bmf
JOIN msdb.dbo.backupmediaset bms ON bmf.media_set_id = bms.media_set_id
JOIN msdb.dbo.backupset bs ON bms.media_set_id = bs.media_set_id
WHERE   bs.[type] = 'D'
AND bs.is_copy_only = 0
)
SELECT 
        database_name AS [Database],
        CAST(backup_size / 1048576 AS DECIMAL(10, 2) ) AS [BackupSizeMB],
        backup_start_date AS [Last Full DB Backup Date],
        physical_device_name AS [Backup File Location]
FROM LastBackUp
WHERE Position = 1
ORDER BY [Database];

Answer 1

您需要先查询数据库列表（在 中sys.databases），然后将其加入您的查询：

WITH LastBackUp AS
(
SELECT  bs.database_name,
        bs.backup_size,
        bs.backup_start_date,
        bmf.physical_device_name,
        Position = ROW_NUMBER() OVER( PARTITION BY bs.database_name ORDER BY bs.backup_start_date DESC )
FROM  msdb.dbo.backupmediafamily bmf
JOIN msdb.dbo.backupmediaset bms ON bmf.media_set_id = bms.media_set_id
JOIN msdb.dbo.backupset bs ON bms.media_set_id = bs.media_set_id
WHERE   bs.[type] = 'D'
AND bs.is_copy_only = 0
)
SELECT 
        sd.name AS [Database],
        CAST(backup_size / 1048576 AS DECIMAL(10, 2) ) AS [BackupSizeMB],
        backup_start_date AS [Last Full DB Backup Date],
        physical_device_name AS [Backup File Location]
FROM sys.databases AS sd
LEFT JOIN LastBackUp AS lb
    ON sd.name = lb.database_name
    AND Position = 1
ORDER BY [Database];