有時候會用到查詢倒數第二條記錄
復制代碼代碼如下:
last=HolderChangeHistory.find_by_sql
([" SELECT * FROM holder_change_histories
where treasure_id = ?
order by id desc
limit 1,1 ",
@hch.treasure_id])
復制代碼代碼如下:
select *
from tablename a
where (
select count(*)
from tablename b
where a.id<b.id)=1
