select b.* from channel a right join channel b
on a.parent_id=b.channel_id
group by b.channel_id having count(a.channel_id)=0
注意:channel_id是表结构自动增长ID,parent_id是父节点ID。
select b.* from channel a right join channel b
on a.parent_id=b.channel_id
group by b.channel_id having count(a.channel_id)=0
注意:channel_id是表结构自动增长ID,parent_id是父节点ID。
01 背 景 播放鏈路是愛奇藝最重要的業務,鏈路穩定性極其重要,隨着愛奇藝用戶的不斷增長和熱播劇集的推廣,播放鏈路往往面臨着難以預估的用戶流量的突增,考