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是表結構自動增長ID,parent_id是父節點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是表結構自動增長ID,parent_id是父節點ID。