解析mysql与Oracle update的区别
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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