Question

好的，这就是我尝试过的：

SELECT 
    DISTINCT [TRANSPORT ADDRESS] AS BUYERS, 
    CASE WHEN FRANCHISE = 'FRANCHISE' THEN COUNT(DISTINCT ORDERID) END AS [FRANCHISE],
    CASE WHEN FRANCHISE = 'OWN' THEN COUNT(DISTINCT ORDERID) END AS [OWN]
FROM JOINED
GROUP BY [TRANSPORT ADDRESS]
ORDER BY [TRANSPORT ADDRESS]

我收到以下错误：

Column 'JOINED.Franchise' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.

count（）函数显然缺少分组，我只是不知道将其添加到哪里，或者甚至有可能以这种方式添加。

我也尝试过更冗长的方式：

SELECT T1.BUYERS, [FRANCHISE SALES], [OWN SALES] 
FROM
    (SELECT DISTINCT [TRANSPORT ADDRESS] AS BUYERS, COUNT(DISTINCT ORDERID) AS [FRANCHISE SALES]
    FROM JOINED
    WHERE FRANCHISE = 'FRANCHISE'
    GROUP BY TRANSPORT ADDRESS]) 
T1
FULL OUTER JOIN
    (SELECT DISTINCT [TRANSPORT ADDRESS] AS BUYERS, COUNT(DISTINCT ORDERID) AS [OWN SALES]
    FROM JOINED
    WHERE FRANCHISE = 'OWN'
    GROUP BY [TRANSPORT ADDRESS]) 
T2
ON T1.BUYERS = T2.BUYERS
ORDER BY T1.BUYERS

但我不想合并两个“买方”属性，以使所有买方都集中在一个栏中。我想我应该在此解决方案中使用UNION，但这会使我做更多的重命名和手动选择。

所以我想知道我是否可以像第一种更简洁的方式那样做。

Answer 1

您可以使用条件聚合，将CASE作为COUNT()的参数：

SELECT [TRANSPORT ADDRESS] AS BUYERS, 
       COUNT(DISTINCT CASE WHEN FRANCHISE = 'FRANCHISE' THEN ORDERID END) AS [FRANCHISE],
       COUNT(DISTINCT CASE WHEN FRANCHISE = 'OWN' THEN ORDERID END) AS [OWN]
FROM JOINED
GROUP BY [TRANSPORT ADDRESS]
ORDER BY [TRANSPORT ADDRESS];

请注意，SELECT DISTINCT几乎永远不适用于GROUP BY。

Answer 2

@Gordon Linoff是正确的。但是我要对@Gordon Linoff进行一点修改。假设可能缺少FRANCHISE'OWN'或'FRANCHISE'

SELECT [TRANSPORT ADDRESS] AS BUYERS, 
           COUNT(DISTINCT CASE WHEN FRANCHISE = 'FRANCHISE' THEN ORDERID Else 0 END) AS [FRANCHISE],
           COUNT(DISTINCT CASE WHEN FRANCHISE = 'OWN' THEN ORDERID Else 0 END) AS [OWN]
    FROM JOINED
    GROUP BY [TRANSPORT ADDRESS]
    ORDER BY [TRANSPORT ADDRESS];

我不清楚。您想要特许经营的总数吗？根据我的假设代码将是.....

SELECT [TRANSPORT ADDRESS] AS BUYERS, 
               COUNT(DISTINCT CASE WHEN FRANCHISE = 'FRANCHISE' THEN ORDERID Else 0 END) AS [FRANCHISE],
               COUNT(DISTINCT CASE WHEN FRANCHISE = 'OWN' THEN ORDERID Else 0 END) AS [OWN],(select count(ORDERID ) from JOINED) as AllFRANCHISE 
        FROM JOINED
        GROUP BY [TRANSPORT ADDRESS]
        ORDER BY [TRANSPORT ADDRESS];

如何在单个选择语句中向多个count（）函数添加条件

2 个答案: