Question

我想要总结/减少销售价值＆＃39;从我的程序中的两个表。销售1有收据，第二是有退货。但我迷失在想法中。

    SELECT *
    FROM @possale1

    SELECT *
    FROM @possale2

    SELECT sum(salevalue) AS S1
    FROM @possale1

    SELECT sum(salevalue)*-1 AS S2
    FROM @possale2

    select sum(sum(a.salevalue)-sum(b.salevalue)) 
    from @possale1 a 
    inner join @possale2 b on a.receiptdate=b.receiptdate

Answer 1

下一步应该没有聚合：

select ((SELECT sum(salevalue) FROM @possale1) - (SELECT sum(salevalue) FROM @possale2)) as balance

Answer 2

你在尝试这个吗？

SELECT SUM(ISNULL(a.salevalue,0) - ISNULL(b.salevalue,0))
FROM @possale1 a FULL OUTER JOIN @possale2 b on a.receiptdate=b.receiptdate

TSQL - 从两个表中获取总和或减去

2 个答案: