Sql Postgres中如何分组并返回求和行
我被困在这里了。我在博士后中有这样一行:Sql Postgres中如何分组并返回求和行,sql,postgresql,aggregate-functions,Sql,Postgresql,Aggregate Functions,我被困在这里了。我在博士后中有这样一行: id amount a 5000 a 1500 a 500 b 2000 b 1000 c 4000 sql语法是如何得到这样的结果的 id amount a 7000 b 3000 c 4000 SELECT id, SUM(amount) AS amount FROM yourtable GROUP BY id
id amount
a 5000
a 1500
a 500
b 2000
b 1000
c 4000
sql语法是如何得到这样的结果的
id amount
a 7000
b 3000
c 4000
SELECT id, SUM(amount) AS amount
FROM yourtable
GROUP BY id