基于月份和年份的Postgres计数

Question

我有一个psql表

Points
id (SERIAL) | user(INTEGER) | time_of_point(TIMESTAMP) | title (TEXT)

我想对用户积分进行细分，以显示其当前月份，当前年份和寿命。

我对如何执行此操作有些迷茫。查询是什么样的？

决赛桌应该像这样

User | Points (this month) | Points (this year) | Lifetime Points
1    |     5               |     10             |     216
2    |     7               |     14             |     125
3    |    15               |    140             |     325

Answer 1

条件聚合怎么样？

select user,
       sum(points) filter (where date_trunc('month', time_of_point) = date_trunc('month', now()) as this_month,
       sum(points) filter (where date_trunc('year', time_of_point) = date_trunc('year', now()) as this_year,
       sum(points) as lifetime
from t
group by user;