Sql Progress DB，需要合并两个查询

我有两个progress数据库查询，我正试图将它们合并到一个语句中，但出现了错误。每个查询只返回一个数字，我想将这两个数字相加。要么这样，要么从头开始进行另一个查询。它们都接受DM1的一组值代码，并且都接受1个产品

问题1

问题2

合并尝试至今

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谢谢

我认为这应该可以做到，因为每个查询都能按预期工作：

SELECT sum1.tot + sum2.tot 
FROM  
(SELECT SUM(opn3.samt) as tot
FROM PUB.ord ord3, PUB.opn opn3
WHERE
ord3.subsnum = opn3.subsnum
AND ord3.onum = opn3.onum
AND ord3.DM1 != ''
AND ord3.DM1 IN('XCWAJC25','WCWAMO73') 
AND ord3.prdcde = 'CSC' 
AND ord3.stat != 16
AND opn3.samt >= 0
GROUP BY ord3.DM1, ord3.prdcde) sum1,

(SELECT SUM((-1 * opn2.samt) + ord2.samt) as tot
FROM PUB.ord ord2, PUB.opn opn2
WHERE
ord2.subsnum = opn2.subsnum
AND ord2.onum = opn2.onum
AND ord2.DM1 != ''
AND ord2.DM1 IN('XCWAJC25','WCWAMO73') 
AND ord2.prdcde = 'CSC' 
AND ord2.stat = 16
AND opn2.samt < 0
GROUP BY ord2.DM1, ord2.prdcde) sum2

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我认为这会起作用，尽管最好有样本数据来验证：

SELECT COALESCE(SUM(a.samt), 0) - COALESCE(SUM(b.samt), 0)
       + COALESCE(SUM(CASE WHEN ord.stat = 16
                                AND b.samt < 0
                           THEN ord.samt END), 0)
FROM PUB.ord ord
LEFT JOIN PUB.opn a
       ON a.subsnum = ord.subsnum
          AND a.onum = ord.onum
          AND a.samt >= 0
          AND ord.stat != 16
LEFT JOIN PUB.opn b
          ON b.subsnum = ord.subsnum
             AND b.onum = ord.onum
             AND b.samt < 0
             AND ord.stat = 16
WHERE ord.DM1 IN('XCWAJC25', 'WCWAMO73') 
      AND ord.prdcde = 'CSC'
GROUP BY ord.DM1

关于查询/资料的说明：

始终显式限定联接，不要使用逗号分隔从句 我认为你不需要ord.DM1！=，假设值必须在特定的集合中 将子句放入左连接条件而不是WHERE子句的效果稍有不同；它将条件添加到联接中，而不是筛选。这意味着可以根据左表中的某些内容排除行，而不管您是否需要实际的行。这就是为什么ord.stat最终会出现在左联接中。从技术上讲，内部联接的行为方式是相同的，但通常不会引起注意，因为导致右表被排除也会排除左表。

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亲爱的上帝，你做到了！天哪，太谢谢你了。你让一个在一个荒唐统治的国家里的脑死程序员非常高兴！

SELECT SUM(opn3.samt + (SELECT SUM((-1 * opn2.samt) + ord2.samt)
    FROM PUB.ord ord2, PUB.opn opn2
    WHERE
    ord2.subsnum = opn2.subsnum
    AND ord2.onum = opn2.onum
    AND ord2.DM1 != ''
    AND ord2.DM1 = ord3.DM1
    AND ord2.prdcde = ord3.prdcde 
    AND ord2.stat = 16
    AND opn2.samt < 0
    GROUP BY ord2.DM1, ord2.prdcde
)) as foo

    FROM PUB.ord ord3, PUB.opn opn3
    WHERE
    ord3.subsnum = opn3.subsnum
    AND ord3.onum = opn3.onum
    AND ord3.DM1 != ''
    AND ord3.DM1 IN('XCWAJC25','WCWAMO73') 
    AND ord3.prdcde = 'CSC' 
    AND ord3.stat != 16
    AND opn3.samt >= 0
    GROUP BY ord3.DM1, ord3.prdcde

SELECT sum1.tot + sum2.tot 
FROM  
(SELECT SUM(opn3.samt) as tot
FROM PUB.ord ord3, PUB.opn opn3
WHERE
ord3.subsnum = opn3.subsnum
AND ord3.onum = opn3.onum
AND ord3.DM1 != ''
AND ord3.DM1 IN('XCWAJC25','WCWAMO73') 
AND ord3.prdcde = 'CSC' 
AND ord3.stat != 16
AND opn3.samt >= 0
GROUP BY ord3.DM1, ord3.prdcde) sum1,

(SELECT SUM((-1 * opn2.samt) + ord2.samt) as tot
FROM PUB.ord ord2, PUB.opn opn2
WHERE
ord2.subsnum = opn2.subsnum
AND ord2.onum = opn2.onum
AND ord2.DM1 != ''
AND ord2.DM1 IN('XCWAJC25','WCWAMO73') 
AND ord2.prdcde = 'CSC' 
AND ord2.stat = 16
AND opn2.samt < 0
GROUP BY ord2.DM1, ord2.prdcde) sum2

SELECT COALESCE(SUM(a.samt), 0) - COALESCE(SUM(b.samt), 0)
       + COALESCE(SUM(CASE WHEN ord.stat = 16
                                AND b.samt < 0
                           THEN ord.samt END), 0)
FROM PUB.ord ord
LEFT JOIN PUB.opn a
       ON a.subsnum = ord.subsnum
          AND a.onum = ord.onum
          AND a.samt >= 0
          AND ord.stat != 16
LEFT JOIN PUB.opn b
          ON b.subsnum = ord.subsnum
             AND b.onum = ord.onum
             AND b.samt < 0
             AND ord.stat = 16
WHERE ord.DM1 IN('XCWAJC25', 'WCWAMO73') 
      AND ord.prdcde = 'CSC'
GROUP BY ord.DM1