mysql通過子查詢的方式插入數據

drop procedure if exists test;          
create procedure test()                 
begin
    declare i int;      #申明變量
    declare count int;                      #申明變量
    set i = 0;                          #變量賦值
        set count=(select count(*) from app_device);  #變量賦值
    while i <count do                     #結束循環的條件: 當i大於count時跳出while循環
        INSERT INTO `app_device_contact` (`serial_number`, `tel`) VALUES (
                (select serial_number from app_device order by device_id asc limit i,1), '3');                                                        
        set i = i + 1;                  #循環一次,i加一
    end while;           
        select * from app_device_contact;                   #查看test表數據
end
call test();