连接两个表，结果显示在表 2 的 min() 字段中

Question

使用 sql 过程，遇到一个找不到解决方案的问题。

表 A 包含字段 a、b、c。 还有一个包含字段 a、w、x、y、z 的表 B。

在这里，我想要两个表的连接结果，其中 A.a = B.a 并在输出中选择 c、x、y、z 等字段，其中 w 是最小值。 w 是一个整数。 以下代码有帮助，但是当我想显示表 2 中的更多字段时，出现错误提示未包含 Group by 子句。

SELECT OutO.routingSequence, 
       tbl2.a AS parentOrderNumber, 
       tbl2.c AS operationNumber,
       tbl2.d as headerStatus,
       tbl2.e as orderNumber
FROM Operation OutO
JOIN (
    SELECT a, MIN(c) c 
    FROM (
        SELECT h.parentordernumber a, o.operationNumber c 
        FROM header h , operation o 
        WHERE o.ordernumber=h.Parentordernumber
        AND (
            SELECT DATEDIFF(day,o.scheduledStartDate, GETDATE()) AS DiffDate
        ) < 3
        AND (
            SELECT DATEDIFF(day,o.scheduledStartDate, GETDATE()) AS DiffDate
        ) > -5
    ) tbl 
    GROUP BY a
) tbl2 
ON OutO.ordernumber = tbl2.a
WHERE OutO.operationnumber = tbl2.c

请帮忙！！！

Answer 1

尝试使用 distinct 而不是 group by

  Select DISTINCT OutO.routingSequence, tbl2.a as parentOrderNumber, tbl2.c as operationNumber from Operation OutO

Answer 2

更新的 SQL 如果您想将其作为输出，您必须从内部选择中选择字段

SELECT OutO.routingSequence, 
       tbl2.a AS parentOrderNumber, 
       tbl2.c AS operationNumber,
       tbl2.d as headerStatus,
       tbl2.e as orderNumber
FROM Operation OutO
JOIN (
    SELECT a, MIN(c) c,MIN(d) AS d,MIN(e) as e
    FROM (
        SELECT h.parentordernumber as a, o.operationNumber as c ,h.headerStatus as d, h.orderNumber as e
        FROM header h inner join  operation o 
        on o.ordernumber=h.Parentordernumber
        AND (
            SELECT DATEDIFF(day,o.scheduledStartDate, GETDATE()) AS DiffDate
        ) < 3
        AND (
            SELECT DATEDIFF(day,o.scheduledStartDate, GETDATE()) AS DiffDate
        ) > -5
    ) tbl 
    GROUP BY a
) tbl2 
ON OutO.ordernumber = tbl2.a
WHERE OutO.operationnumber = tbl2.c

Answer 3

对不起，我不明白 d 和 e 和 w 列在哪里是你的 sql 您可以使用 row_number 和 partition by，以像这样按最小值第一行排序

SELECT OutO.routingSequence, 
       tbl2.a AS parentOrderNumber, 
       tbl2.c AS operationNumber,
       tbl2.d as headerStatus,
       tbl2.e as orderNumber
FROM Operation OutO
JOIN (
       select a,c,e,d from (
        SELECT h.parentordernumber a, o.operationNumber c,
               something1 as d,
               something2 as e,
               -- where this = 1 there is your minimum row
               row_number() over (partition by h.parentordernumber
                                      order by w ) Rn
        FROM header h , operation o 
        WHERE o.ordernumber=h.Parentordernumber
        AND (
            SELECT DATEDIFF(day,o.scheduledStartDate, GETDATE()) AS DiffDate
        ) < 3
        AND (
            SELECT DATEDIFF(day,o.scheduledStartDate, GETDATE()) AS DiffDate
        ) > -5
   ) where Rn = 1 -- here we need only first row in every windows
) tbl2 
ON OutO.ordernumber = tbl2.a
WHERE OutO.operationnumber = tbl2.c