SQL Server 缺少备份

Question

我正在尝试获取丢失的完整备份的列表，但我需要此列表来显示哪个用户执行了最新备份。问题是，我不知道如何过滤它，因为我查询的是返回每个用户的所有最后备份。

例子：

SELECT 
    @@SERVERNAME AS ServerName,
    d.[name] AS DatabaseName,
    b.user_name as UserName,
    'Backups Not Performed Recently' AS Finding,
    'Last backed up: ' + COALESCE(CAST(MAX(b.backup_finish_date) AS VARCHAR(25)),'never') AS Details
FROM    
    master.sys.databases d
LEFT OUTER JOIN 
    msdb.dbo.backupset b ON d.name COLLATE SQL_Latin1_General_CP1_CI_AS = b.database_name COLLATE SQL_Latin1_General_CP1_CI_AS
                         AND b.type = 'D'
                         AND b.server_name = SERVERPROPERTY('ServerName') /*Backupset ran on current server */
WHERE   
    d.database_id <> 2  /* Bonus points if you know what that means */
    AND d.state NOT IN(1, 6, 10) /* Not currently offline or restoring, like log shipping databases */
    AND d.is_in_standby = 0 /* Not a log shipping target database */
    AND d.source_database_id IS NULL /* Excludes database snapshots */
GROUP BY 
    d.name, b.user_name
HAVING  
    MAX(b.backup_finish_date) <= DATEADD(dd, -7, GETDATE())
    OR MAX(b.backup_finish_date) IS NULL

返回：

ServerName  DatabaseName    UserName    Finding Details
ServerA     DatabaseA       Userxyz     Backups Not Performed Recently  Last backed up: Nov 30 2016  2:45PM
ServerA     DatabaseA       Userabc     Backups Not Performed Recently  Last backed up: Nov 24 2016 12:36PM
ServerA     DatabaseA       Userdef     Backups Not Performed Recently  Last backed up: Feb  5 2017  1:26AM

当我只需要它返回最新日期的 id 和结果时。期望的结果如下所示：

ServerName  DatabaseName    UserName    Finding Details
ServerA     DatabaseA       Userxyz     Backups Not Performed Recently  Last backed up: Feb  5 2017  1:26AM

Answer 1

我们可以在这里使用行号为每个数据库选择最近的备份条目：

WITH cte AS (
    SELECT @@SERVERNAME AS ServerName,
           d.[name] AS DatabaseName,
           b.user_name as UserName,
           'Backups Not Performed Recently' AS Finding,
           'Last backed up: ' + COALESCE(CAST(MAX(b.backup_finish_date) AS VARCHAR(25)),'never') AS Details,
           ROW_NUMBER() OVER (PARTITION BY d.[name] ORDER BY MAX(b.backup_finish_date) DESC) rn
    FROM master.sys.databases d
    LEFT OUTER JOIN msdb.dbo.backupset b
        ON d.name COLLATE SQL_Latin1_General_CP1_CI_AS = b.database_name COLLATE SQL_Latin1_General_CP1_CI_AS AND
           b.type = 'D' AND
           b.server_name = SERVERPROPERTY('ServerName')
    WHERE d.database_id <> 2 AND
          d.state NOT IN(1, 6, 10) AND
          d.is_in_standby = 0 AND
          d.source_database_id IS NULL
    GROUP BY d.name,
             b.user_name
    HAVING MAX(b.backup_finish_date) <= DATEADD(dd, -7, GETDATE()) OR
           MAX(b.backup_finish_date) IS NULL
)
SELECT *
FROM cte t
WHERE t.rn = 1