[英]How to use multiple columns but only one column in GROUP BY and ORDER BY
我想显示连接表中的多列,但只使用一列进行group by
和order by
我的 PostgreSQL 查询是这样的:
SELECT DISTINCT ON (r.id_rekrutmen)
r.id_rekrutmen,
r.judul_rekrutmen,
rw.tanggal_rekrutmen
FROM rekrutmen r
INNER JOIN rekrutmen_waktu rw
ON r.id_rekrutmen = rw.id_rekrutmen
ORDER BY r.id_rekrutmen, rw.tanggal_rekrutmen DESC;
我认为这就是你想要的:
SELECT
r.id_rekrutmen,
r.judul_rekrutmen,
MAX(rw.tanggal_rekrutmen) AS tanggal_rekrutmen
FROM rekrutmen r
INNER JOIN rekrutmen_waktu rw
ON r.id_rekrutmen = rw.id_rekrutmen
GROUP BY
r.id_rekrutmen,
r.judul_rekrutmen,
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