如何在Oracle SQL中检索同一日期的组中的第一条记录和最后一条记录

Question

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请建议我，我已经尝试使用Oracle SQL中的分区和组，但是无法获得正确的查询

Answer 1

一个选项两次使用row_number()：

select primary_key, id, created_date
from (
    select
        t.*,
        row_number() over(partition by id, trunc(created_date) order by created_date  asc) rn_asc,
        row_number() over(partition by id, trunc(created_date) order by created_date desc) rn_desc
    from mytable t
) t
where 1 in (rn_asc, rn_desc)