最近在做一个在线阅读网站,网站的内容通过爬取其它网站获取,后来发现好多数据都是重复的,需要删除重复的数据,试了几种方法,最终删除成功。
delete from novel where id not in(
select b. id from( select min(id) as id from novel group by(book_name) ) as b)
最近在做一个在线阅读网站,网站的内容通过爬取其它网站获取,后来发现好多数据都是重复的,需要删除重复的数据,试了几种方法,最终删除成功。
delete from novel where id not in(
select b. id from( select min(id) as id from novel group by(book_name) ) as b)