mysql 如何寫存儲過程

創建存儲過程的代碼：

 

delimiter $$
drop procedure if exists orderstockamount$$
create procedure orderstockamount()
begin
 declare _check_tag int; /*審覈標誌*/
 declare _product_id varchar(50); /*產品id*/
 declare _amount int ; /*表示未審覈數量*/
 declare _amount_check int; /*表示已審覈數量*/
 declare done int default 0;  /*表示是否是結束標誌*/
 
 /*定義遊標*/
 declare rs_cursor cursor for select check_tag,product_id,amount,amount_check from crm_order_details where order_id in (select order_id from crm_order where customer_name not like '%華東樂購%' and check_tag <> 9 and pay_tag <> 3 );
 
 declare continue handler for not found set done=1;
 open rs_cursor;
 cursor_loop:loop
  fetch rs_cursor into _check_tag,_product_id,_amount,_amount_check; /*取數據*/
 if done = 1 then
  leave cursor_loop;
 end if;
 if _check_tag = 0 then
  insert into order_data_temp values(_product_id,_amount);
 end if;
 if _check_tag = 1 then
  insert into order_data_temp values(_product_id,_amount_check);
 end if;
 end loop cursor_loop;
 close rs_cursor;
end$$
delimiter ;