sql - 需要sql查询

Question

表格显示：showid、tutle、链接显示状态运行时分类。
表剧集：episodeid，showid，episodeNumber，seasonNumber，airDate，title。

您好，我需要 sql 查询来选择标题序列并计算已经发布的剧集（edisodes.airDate - 发布日期剧集）请帮助我）谢谢谁的帮助。

Answer 1

select  s.title
,       s.serial
,       e.title
,       sum(case when e.airDate <= current_timestamp then 1 end) 
            over (partition by s.title, s.serial)
from    shows s
left join
        episodes e
on      e.showid = s.showid
        and e.airDate <= current_timestamp

Answer 2

可以在那里使用子查询。例如

select s.title, s.serial, e.count
from shows s, (select showId, count(*) as count 
                from episodes 
                where airDate <= current_timestamp
                group by showId) e
where s.showId == e.showId