Question

我正在尝试创建一个分子（num）和分母（den）列，我稍后会用它来创建一个度量值。在我的分子专栏中，我需要有一个我的分母列没有的标准。当我将where子句添加到我的子查询时，我收到以下错误。我不想将INRInRange添加到我的Group By子句中。

列'dbo.PersonDetailB.INRInRange'在选择列表中无效，因为它不包含在聚合函数或GROUP BY子句中。“

SELECT 
        dbo.PersonDetailSpecialty.PracticeAbbrevName, 
        (SELECT COUNT(DISTINCT dbo.Problem.PID) WHERE PersonDetailB.INRInRange='True') AS num, 
        COUNT(DISTINCT dbo.Problem.PID) AS den 
FROM         
        dbo.PersonDetailB
RIGHT OUTER JOIN
        dbo.PersonDetailSpecialty ON dbo.PersonDetailB.PID = dbo.PersonDetailSpecialty.PID
LEFT OUTER JOIN
        dbo.Problem ON dbo.PersonDetailSpecialty.PID = dbo.Problem.PID

GROUP BY 
        practiceabbrevname

Answer 1

创建一个子查询，该查询计算PersonDetailB.INRInRange并使用原始查询LEFT OUTER JOIN。

SELECT Main.PracticeAbbrevName, InRange.Num AS num, Main.den
FROM
    (SELECT 
            dbo.PersonDetailSpecialty.PracticeAbbrevName, 
            COUNT(DISTINCT dbo.Problem.PID) AS den 
    FROM         
            dbo.PersonDetailB
    RIGHT OUTER JOIN
            dbo.PersonDetailSpecialty ON dbo.PersonDetailB.PID = dbo.PersonDetailSpecialty.PID
    LEFT OUTER JOIN
            dbo.Problem ON dbo.PersonDetailSpecialty.PID = dbo.Problem.PID
    GROUP BY 
            practiceabbrevname) Main
    LEFT OUTER JOIN
            (SELECT practiceabbrevname, COUNT(DISTINCT dbo.Problem.PID) Num WHERE PersonDetailB.INRInRange='True' GROUP BY practiceabbrevname) InRange ON Main.practiceabbrevname = InRange.practiceabbrevname

Answer 2

这句话的问题：

SELECT dbo.PersonDetailSpecialty.PracticeAbbrevName, 
       (SELECT COUNT(DISTINCT dbo.Problem.PID) WHERE PersonDetailB.INRInRange = 'True') AS num, 
       COUNT(DISTINCT dbo.Problem.PID) AS den

PersonDetailB.INRInRange1在每个组中都没有唯一值。它有可能。一种方法是将其添加到GROUP BY：

GROUP BY practiceabbrevname, PersonDetailB.INRInRange

另一种方法是在子查询中使用聚合函数：

SELECT dbo.PersonDetailSpecialty.PracticeAbbrevName, 
       (SELECT COUNT(DISTINCT dbo.Problem.PID) WHERE MAX(PersonDetailB.INRInRange) = 'True') AS num, 
       COUNT(DISTINCT dbo.Problem.PID) AS den

Answer 3

在子查询中的where条件上将单独的表作为不同的名称加入。

SELECT    PersonDetailSpecialty.PracticeAbbrevName,
          COUNT(PDTRUE.PID) as num, 
          COUNT(dbo.Problem.PID) AS den

FROM      dbo.PersonDetailSpecialty LEFT OUTER JOIN
          dbo.PersonDetailB as PDTRUE ON dbo.PersonDetailSpecialty.PID = PDTRUE.PID and PDTRUE.INRInRange='True' LEFT OUTER JOIN
          dbo.PersonDetailB ON dbo.PersonDetailSpecialty.PID = PersonDetailB.PID LEFT OUTER JOIN
          dbo.Medicate ON dbo.PersonDetailSpecialty.PID = dbo.Medicate.PID LEFT OUTER JOIN
          dbo.Problem ON dbo.PersonDetailSpecialty.PID = dbo.Problem.PID

GROUP BY  PersonDetailSpecialty.PracticeAbbrevName

这是FROM部分所需的相关代码

dbo.PersonDetailSpecialty LEFT OUTER JOIN dbo.PersonDetailB as PDTRUE 
ON dbo.PersonDetailSpecialty.PID = PDTRUE.PID and PDTRUE.INRInRange='True'

这可以让你添加

COUNT(PDTRUE.PID) as num,

作为整体选择查询的简单部分

子查询Where子句在选择列表中无效

3 个答案: