Home Database Mysql Tutorial 解析mysql与Oracle update的区别

解析mysql与Oracle update的区别

Jun 07, 2016 pm 04:17 PM
mysql oracle update the difference parse

本篇文章是对mysql与Oracle update的区别进行了详细的分析介绍,需要的朋友参考下 update :单表的更新不用说了,两者一样,主要说说多表的更新 复制代码 代码如下: 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

本篇文章是对mysql与Oracle update的区别进行了详细的分析介绍,需要的朋友参考下

 

update :单表的更新不用说了,两者一样,主要说说多表的更新

复制代码 代码如下:

      
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;

 

复制代码 代码如下:


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......;

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