存储过程

游标

delimiter //
create procedure p6()
begin 
    declare row_id int; -- 自定义变量1  
    declare row_num int; -- 自定义变量2  
    declare done INT DEFAULT FALSE;
    declare temp int;

    declare my_cursor CURSOR FOR select id,num from A;
    declare CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
    
    open my_cursor;
        xxoo: LOOP
            fetch my_cursor into row_id,row_num;
            if done then 
                leave xxoo;
            END IF;
            set temp = row_id + row_num;
            insert into B(number) values(temp);
        end loop xxoo;
    close my_cursor;
end //
delimiter ;