Postgresql 如何在博士后身上做到这一点？

我有一个这样的桌子结构

id  status action amount fid
1    P      Yes   3000    10
2    P      No    2000    10
3    P      Yes   6000    10
4    D      Yes   500     10
5    D      No    600     10
6    V      Yes   800     10

我想用-->状态p操作是、状态D操作否和状态V操作是进行一次筛选。结果将基于fid

这样的输出-->

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假设您只打算报告上述示例数据中显示的三种状态，我们可以尝试：

SELECT
    fid,
    SUM(amount) FILTER (WHERE status = 'P' AND action = 'Yes') AS amount_1,
    SUM(amount) FILTER (WHERE status = 'D' AND action = 'No')  AS amount_2,
    SUM(amount) FILTER (WHERE status = 'V' AND action = 'Yes') AS amount_3
FROM yourTable
GROUP BY fid;

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假设您只想报告上述样本数据中显示的三种状态，我们可以尝试：

SELECT
    fid,
    SUM(amount) FILTER (WHERE status = 'P' AND action = 'Yes') AS amount_1,
    SUM(amount) FILTER (WHERE status = 'D' AND action = 'No')  AS amount_2,
    SUM(amount) FILTER (WHERE status = 'V' AND action = 'Yes') AS amount_3
FROM yourTable
GROUP BY fid;

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谢谢你@Tim Biegeleisen。我得到了想要的结果。谢谢你@Tim Biegeleisen。我得到了期望的输出。