mysql - 将两个 MYSQL WHERE 查询连接在一起

Question

我想将 2 个查询的结果连接在一起，这样我最终得到 3 列，第一列是 MONTH，第二列是 WITHDRAWALS，第三列是 DEPOSITS。

查询 1:

SELECT
    DATE_FORMAT(Time, "%m-%Y") AS MONTH,
    SUM(Profit_Loss) AS DEPOSITS
FROM
    `deposits_withdrawals_view`
WHERE
    Summary = 'Cash In'
GROUP BY
    DATE_FORMAT(Time, "%m-%Y")

查询 2:

SELECT
    DATE_FORMAT(Time, "%m-%Y") AS MONTH,
    SUM(Profit_Loss) AS WITHDRAWALS
FROM
    `deposits_withdrawals_view`
WHERE
    Summary = 'Cash Out'
GROUP BY
    DATE_FORMAT(Time, "%m-%Y")

两者都单独工作，但如何在 1 个查询中将它们连接在一起？

感谢您的帮助。

Answer 1

你可以为此做条件聚合

select
DATE_FORMAT(Time, "%m-%Y") AS MONTH,
sum(case when Summary='Cash In' then Profit_Loss else 0 end) as DEPOSITS,
sum(case when Summary='Cash Out' then Profit_Loss else 0 end) as WITHDRAWALS
FROM
    `deposits_withdrawals_view`
GROUP BY MONTH