MySql报错： You can't specify target table 'table name' for update in FROM clause

错误提示就是说，不能先select出同一表中的某些值，再update这个表(在同一语句中) 

替换方案： 
create table tmp as select min(id) as col1 from blur_article group by title;
delete from blur_article where id not in (select col1 from tmp); 
drop table tmp;