Question

我有一个表，该表的行中有数据，数据需要按列汇总。当前，数据确实会进入列中，但是数据重复并且顺序错误。同样，当我输入多个服务器名称时，我将获得服务器1列和信息服务器2列将为空，服务器3列将包含数据。

我已经查看了关于stackoverflow，social.msdn.microsoft.com，sqlservercentral.com和sqlshack.com的答案

WITH 
cte (Captivate_Id, Building_Name ,Server_Name,Server_Number)
as

   (
     SELECT b.[Captivate_Id], b.[Building_Name] as Building_Name
     ,(s.Server_Name) as Server_Name
     ,ROW_NUMBER() OVER(ORDER BY s.Server_Name DESC) AS Server_Number
      FROM [CAP-CORPCRM02].[CAP_ProductionED].dbo.server s
      join [CAP-CORPCRM02].[CAP_ProductionED].dbo.building b on 
      s.building_id = b.building_id
      WHERE s.Server_Name IS NULL
      UNION ALL
      SELECT b.[Captivate_Id], b.[Building_Name] as Building_Name
      ,(s.Server_Name) as Server_Name
      ,ROW_NUMBER() OVER(ORDER BY s.Server_Name DESC) AS Server_Number 
       FROM [CAP-CORPCRM02].[CAP_ProductionED].dbo.server s
       join [CAP-CORPCRM02].[CAP_ProductionED].dbo.building b on 
        s.building_id = b.building_id

        AND b.Captivate_Id IN 
        (
          'FFF1234'
         )
         )

SELECT Captivate_ID as ID,Building_Name as Building_Name,
(SELECT Server_Name FROM CTE ct WHERE ct.Building_Name=cte.Building_Name 
AND ct.Server_Number=1) Server1,    -----, -- works but order wrong
(SELECT Server_Name FROM CTE ct WHERE ct.Building_Name=cte.Building_Name 
AND ct.Server_Number=2) Server2, -- works but order wrong
(SELECT Server_Name FROM CTE ct WHERE ct.Building_Name=cte.Building_Name 
AND ct.Server_Number=3) Server3

FROM cte

输出

ID  Building_Name   Server1     Server2     Server3 
FFF1234 some name   servername1 servername2 NULL    
FFF1234 some name   servername1 servername2 NULL

我希望输出为

ID  Building_Name   Server1     Server2     Server3 
FFF1234 some name   servername1 servername2 blank

Answer 1

您对ROW_NUMBER()的工作方式有误解。使用两个不同的ROW_NUMBER()命令，您将拥有两个单独的行号序列。您可以通过如下更改CTE来解决问题：

WITH cte1 (Captivate_Id, Building_Name ,Server_Name)
    AS (
        SELECT b.[Captivate_Id], b.[Building_Name] as Building_Name
            ,'' as Server_Name    -- If you want a blank servername, make it so
        FROM [CAP-CORPCRM02].[CAP_ProductionED].dbo.server s
        join [CAP-CORPCRM02].[CAP_ProductionED].dbo.building b 
            on     s.building_id = b.building_id
        WHERE s.Server_Name IS NULL

        UNION ALL

        SELECT b.[Captivate_Id], b.[Building_Name] as Building_Name
            ,(s.Server_Name) as Server_Name
        FROM [CAP-CORPCRM02].[CAP_ProductionED].dbo.server s
        join [CAP-CORPCRM02].[CAP_ProductionED].dbo.building b 
            on s.building_id = b.building_id
        AND b.Captivate_Id IN (
            'FFF1234'
            )
    ),
cte (Captivate_Id, Building_Name ,Server_Name, Server_Number)
    as (
        SELECT Captivate_ID,
            Building_Name,
            Server_Name,
            ROW_NUMBER() OVER(ORDER BY s.Server_Name DESC) AS Server_Number 
        FROM cte1
    )

SELECT Captivate_ID as ID,Building_Name as Building_Name,
    (SELECT Server_Name FROM CTE ct WHERE ct.Building_Name=cte.Building_Name AND ct.Server_Number=1) Server1,-----, -- works but order wrong
    (SELECT Server_Name FROM CTE ct WHERE ct.Building_Name=cte.Building_Name AND ct.Server_Number=2) Server2, -- works but order wrong
    (SELECT Server_Name FROM CTE ct WHERE ct.Building_Name=cte.Building_Name AND ct.Server_Number=3) Server3
FROM cte

SPOILER-原始错误代码

与 cte（Captivate_Id，Building_Name，Server_Name，Server_Number）作为（选择Captivate_ID，建筑名称，服务器名称， ROW_NUMBER（）OVER（ORDER BY s.Server_Name DESC）AS Server_Number 来自（选择b。[Captivate_Id]，b。[Building_Name]作为Building_Name ，''作为Server_Name-如果您想要一个空白的服务器名，请这样 -，ROW_NUMBER（）OVER（ORDER BY s.Server_Name DESC）AS Server_Number 来自[CAP-CORPCRM02]。[CAP_ProductionED] .dbo.server s 加入[CAP-CORPCRM02]。[CAP_ProductionED] .dbo.building b 在s.building_id = b.building_id上 s.Server_Name是NULL 全联盟选择b。[Captivate_Id]，b。[Building_Name]作为Building_Name ，（s.Server_Name）作为Server_Name -，ROW_NUMBER（）OVER（ORDER BY s.Server_Name DESC）AS Server_Number 来自[CAP-CORPCRM02]。[CAP_ProductionED] .dbo.server s 加入[CAP-CORPCRM02]。[CAP_ProductionED] .dbo.building b 在s.building_id = b.building_id上 AND b.Captivate_Id IN（ 'FFF1234' ）））

编写CTE查询，记录被重复并且顺序错误

1 个答案: