mysql 子查询求和，如校验码答案

【问题标题】：mysql subquery to sum like checknumbersmysql 子查询求和，如校验码
【发布时间】：2015-03-14 23:30:33
【问题描述】：

我有两张表，一张带有 id 和我正在检查重复项的字段连接，另一张带有 id 和所有其他分类数据，其中一项是 AmountPaid。以下查询：

Select
i.id,
i.CheckNumber,
AmountPaid
from
HS i where i.id in (
SELECT id
FROM HS_dups
WHERE concatckBatch IN (SELECT *
      FROM (SELECT concatckBatch
      FROM HS_dups
      GROUP BY concatckBatch
      HAVING COUNT(concatckBatch) > 1) AS a) AND concatckBatch != '')

给了我这个答案：

id  checkNumber amount
15  1114392      1708.5
16  1114392      1432.2
17  1114392      1188.06
18  1114392      1405.25
19  1114392      603.96

我需要它给我这个答案，它是所有相同的支票号码和对应的id的总和：

id  checkNumber amount
15  1114392     6337.97
16  1114392     6337.97
17  1114392     6337.97
18  1114392     6337.97
19  1114392     6337.97

我尝试了各种子查询，但由于某种原因我遇到了困难。

已编辑：感谢 jpw，这是正确答案：

Select
    i.id,
    i.CheckNumber,
    i2.AmountPaid
from
HS i join (
    select 
       checknumber, 
       sum(amountpaid) AmountPaid 
    from HS 
where id in (
       SELECT id
       FROM HS_dups
       WHERE concatckBatch IN (
          SELECT *
          FROM (
             SELECT concatckBatch
             FROM HS_dups
             GROUP BY concatckBatch
             HAVING COUNT(concatckBatch) > 1
          ) AS a
       ) AND concatckBatch != ''
    )
    group by checknumber) i2 on i2.checkNumber = i.checkNumber
where 
    i.id in (
       SELECT id
       FROM HS_dups
       WHERE concatckBatch IN (
          SELECT *
          FROM (
             SELECT concatckBatch
             FROM HS_dups
             GROUP BY concatckBatch
             HAVING COUNT(concatckBatch) > 1
          ) AS a
       ) AND concatckBatch != ''
    )

【问题讨论】：

标签： mysql subquery rollup

【解决方案1】：

您可以在派生表中进行计算。查询应该是不言自明的。

Select
    i.id,
    i.CheckNumber,
    i2.AmountPaid
from
    HS i 
join (
    select 
       checknumber, 
       sum(amountpaid) AmountPaid 
    from HS 
    group by checknumber
) i2 on i2.checkNumber = i.checkNumber
where 
    i.id in (
       SELECT id
       FROM HS_dups
       WHERE concatckBatch IN (
          SELECT *
          FROM (
             SELECT concatckBatch
             FROM HS_dups
             GROUP BY concatckBatch
             HAVING COUNT(concatckBatch) > 1
          ) AS a
       ) AND concatckBatch != ''
    )

在其他数据库中，这可以通过使用窗口分析函数轻松实现，例如 sum(i.amountpaid) over (partition by i.checknumber)，但遗憾的是 MySQL 不支持该构造。

【讨论】：