Select postgresql 中两个日期之间的月份

Question

例如，我有一份报告要求二月的列 Created_date 从 2022-01-26 开始并在 2022-02-25

结束

我将如何设置查询以便检索以下 table 作为响应：

            **Month of the year**

Feb (((Description: Start from 2021/01/26 to 2022/02/25)))

Mar (((Description: Start from 2021/02/26 to 2022/03/25)))

Apr (((Description: Start from 2021/03/26 to 2022/04/25)))

May (((Description: Start from 2021/04/26 to 2022/05/25)))

我把描述写得通俗易懂，我不需要table。

顺便说一句，我对格式太在意了，任何有效的都行。

Answer 1

这将生成四行三列：

select to_char(dt, 'Mon') as month,
       dt::date as start_day,
       (dt::date + interval '1 month')::date as end_day
from generate_series(date '2021-01-26', 
                     date '2021-04-26', interval '1 month') as g(dt)

如果您希望将其作为单列，则只需格式化并连接值：

select to_char(dt, 'Mon')||' (((Description: Start from '||
       to_char(dt, 'yyyy/mm/dd')||' to '||
       to_char((dt::date + interval '1 month'), 'yyyy/mm/dd')||')))'
from generate_series(date '2021-01-26', 
                     date '2021-04-26', interval '1 month') as g(dt)

Select postgresql 中两个日期之间的月份

Select month between 2 date in postgresql

postgresql

generate-series