Mysql 利用 游标 存储过程 循环批量修改数据库 阿星小栈

drop procedure if exists my_procedure;

delimiter $

create procedure my_procedure()

begin

declare row_cat_id int;

declare row_cat_id_org int;

declare row_cat_name varchar(90);

declare row_parent_id int;

declare cnt int default 0;

declare i int default 0;

declare getcategory cursor for select a.id,b.org_id from teacher_timeline as a left join teacher_class as b on a.class_id = b.id;

select count(*) into cnt from teacher_timeline;

open getcategory;

repeat

set i:=i+1;

fetch getcategory into row_cat_id,row_cat_id_org;

update teacher_timeline set org_id = row_cat_id_org where id=row_cat_id;

until i>=cnt end repeat;

close getcategory;

end$

call my_procedure()$