Question

我正在尝试进行类似这样的查询...

id | id2 | profit | expense | status | date
1     1      10       20      Active  7-3-11
1     1      11        5      Not Act 7-4-11
1     2      5        10      Active  7-4-11

我希望按ID分组，Id2将利润和费用列相加，然后返回最新状态，就像这样。

id | id2 | profit | expense | status
1     1      22       25      Not Act
1     2      5        10      Active

到目前为止我所尝试的是缺少它应该具有的大部分数据，并且大多数时候id为null但并非总是如此。

SELECT * FROM
    tbl
  JOIN
    (SELECT
       id,
       id2,
       max(date) maxdate
     FROM
       tbl
     GROUP BY
       id,
       id2) sub
  ON tbl.id = sub.id AND
     tbl.id2 = sub.id2 AND
     tbl.date = sub.maxdate;

任何帮助都会很棒！

Answer 1

SELECT
       id,
       id2,
       sum(profit) profit,
       sum(expense) expense,
       (select status from tbl t1 where t1.id=tbl.id and t1.id2=tbl.id2 order by date desc limit 1)
     FROM
       tbl
     GROUP BY
       id,
       id2

查询最新的列并总结MySQL中的其他列

1 个答案: