Home  >  Article  >  Database  >  解析mysql与Oracle update的区别_MySQL

解析mysql与Oracle update的区别_MySQL

WBOY
WBOYOriginal
2016-06-01 13:25:14918browse

bitsCN.com update :单表的更新不用说了,两者一样,主要说说多表的更新
      
Oracle> Oracle的多表更新要求比较严格,所以有的时候不是很好写,我们可以试试Oracle的游标
        update (
        select t.charger_id_ new_charger_id_
        from t_cus_year_status t
        left join t_customer_infos cus on cus.id_ = t.cus_id_
        where....
        ) n  set  n.new_charger_id_ =6;



mysql>
      update t_cus_year_status t
      left join t_customer_infos cus on cus.id_ = t.cus_id_
      set t.charger_id_  =6
      where......;

bitsCN.com

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn