SQL 如何在Postgres中分组并返回总和行

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时间:2020-09-01 13:08:30  来源:igfitidea点击:

how to group by and return sum row in Postgres

sqlpostgresqlaggregate-functions

提问by kuslahne

I am stuck here. I have row in Postgres like this:

我被困在这里。我在 Postgres 中有这样的行:

id      amount
a       5000
a       1500
a       500
b       2000
b       1000
c       4000

How is the sql syntax to get result like this?

获得这样的结果的 sql 语法如何?

id      amount
a       7000
b       3000
c       4000

回答by Marc B

SELECT id, SUM(amount) AS amount
FROM yourtable
GROUP BY id