mysql与Oracle update的区别

    技术2022-05-11  6

    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

                        (游标参考:http://blog.csdn.net/lovelyhermione/archive/2009/08/18/4457500.aspx)

              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......;


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