查询排除在两列中找到的值

Question

我在论坛上找不到这个，更不知道如何描述它。

设置：我有一个数据库，我在其中加入了很多包含人员、他们的任务和时间条目的表。这是一个平面视图，因此时间条目具有与其关联的属性，并且项目也具有其自己的属性。时间条目和项目都有与之关联的客户

问题：我需要执行几个差异查询。此人不应负责未分配给他们的项目。我只想看那些。我运行面临的挑战是是否可以将此人分配给多个客户。表的连接方式在与时间条目数据连接后可能会产生误导。即：

Person | Assigned Customer | Time Entry Customer
Joe    | Customer A        | Customer C
Joe    | Customer B        | Customer C
Joe    | Customer B        | Customer A

在上面的示例输出中，应过滤掉第 1 行和第 3 行，因为 'Joe' 已分配给客户 A（第 1 行）并且正在向客户 A（第 3 行）收费。

我曾尝试执行 EXISTS 语句来过滤掉一些东西，但我无法理解语法（我知道结果与我在下面的查询中没有 EXISTS 子句时的结果相同） :

SELECT A.[Assigned Engineer]
    ,YEAR(A.[Date]) AS [Year]
    ,dbo.ISOweek(A.[Date]) AS [Week]
    ,A.[Customer] AS [Charging Customer]
    ,A.[Project Customer] AS [Project Customer]
    ,SUM(A.[Hours]) AS [Hours]
FROM SkyNet.dbo.PROJECT_ASSIGNMENT_AND_CHARGES_DASHBOARD A
WHERE A.[Customer] NOT LIKE '%' + A.[Project Customer] +'%'
    AND YEAR(A.[Date])=2015
    AND dbo.ISOweek(A.[Date])=1
    AND EXISTS
    (SELECT B.[Assigned Engineer]
    ,YEAR(B.[Date]) AS [Year]
    ,dbo.ISOweek(A.[Date]) AS [Week]
    ,B.[Customer] AS [Charging Customer]
    ,B.[Project Customer] AS [Project Customer]
    ,SUM(B.[Hours]) AS [Hours]
    FROM SkyNet.dbo.PROJECT_ASSIGNMENT_AND_CHARGES_DASHBOARD B
    WHERE A.[Assigned Engineer]=B.[Assigned Engineer]
        AND A.[Customer] NOT LIKE '%' + B.[Project Customer] +'%'
    GROUP BY B.[Assigned Engineer], YEAR(B.[Date]), dbo.ISOweek(B.[Date]),     B.[Customer], B.[Project Customer]
    )
GROUP BY A.[Assigned Engineer], YEAR(A.[Date]), dbo.ISOweek(A.[Date]), A.    [Customer], A.[Project Customer]
ORDER BY A.[Assigned Engineer]

如有任何帮助，我们将不胜感激！

编辑 - 2015 年 2 月 27 日

这里是一些请求的示例数据：

 Assigned Engineer | Date     | Charging Customer | Project Customer | Hours
 Joe               | 1/4/2015 | Customer A - EAST | Customer A       | 8
 Joe               | 1/4/2015 | Customer B        | Customer A       | 16
 Joe               | 1/4/2015 | Customer A - EAST | Customer C       | 8
 Joe               | 1/4/2015 | Customer B        | Customer C       | 16

Answer 1

这可以通过左连接来解决吗？在我的加入中，我正在查看与指定客户匹配的行与与项目客户相同的客户的行。然后，在我的 where 子句中，我只撤回未找到匹配项的行。

SELECT A.[Assigned Engineer]
    ,YEAR(A.[Date]) AS [Year]
    ,dbo.ISOweek(A.[Date]) AS [Week]
    ,A.[Customer] AS [Charging Customer]
    ,A.[Project Customer] AS [Project Customer]
    ,SUM(A.[Hours]) AS [Hours]
FROM SkyNet.dbo.PROJECT_ASSIGNMENT_AND_CHARGES_DASHBOARD A
left outer join SkyNet.dbo.PROJECT_ASSIGNMENT_AND_CHARGES_DASHBOARD B
    ON A.[Assigned Engineer] = B.[Assigned Engineer] AND
       (B.[Customer] LIKE A.[Project Customer] + '%' = OR A.[Customer] LIKE B.[Project Customer] + '%')
WHERE b.[Customer] IS NULL

编辑：更改连接以反映 OP 的数据。

Answer 2

我相信我已经回答了我自己的问题...我的前额只需要到达墙上的石膏板 :) 我知道这会很简单，但我无法足够快地到达那里。使用 COUNT 和子查询，我能够过滤掉收费客户与指定客户相似的所有记录。我希望这能够在未来帮助其他人：

SELECT A.[Assigned Engineer]
    ,YEAR(A.[Date]) AS [Year]
    ,dbo.ISOweek(A.[Date]) AS [Week]
    ,A.[Customer] AS [Charging Customer]
    ,A.[Project Customer] AS [Project Customer]
    ,A.[Hours]
FROM SkyNet.dbo.PROJECT_ASSIGNMENT_AND_CHARGES_DASHBOARD A
WHERE A.[Customer] NOT LIKE '%' + A.[Project Customer] + '%'
    AND 1>(SELECT COUNT(*) 
        FROM SkyNet.dbo.PROJECT_ASSIGNMENT_AND_CHARGES_DASHBOARD B
        WHERE A.[Assigned Engineer]=B.[Assigned Engineer]
            AND YEAR(A.[Date])=YEAR(B.[Date])
            AND dbo.ISOweek(A.[Date])=dbo.ISOweek(B.[Date])
            AND A.[Customer] LIKE '%' + B.[Project Customer] + '%'
            AND A.[Hours]=B.[Hours])
ORDER BY A.[Assigned Engineer]
    ,YEAR(A.[Date])
    ,dbo.ISOweek(A.[Date])

查询排除在两列中找到的值

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