mysql 存儲過程、循環

CREATE PROCEDURE  questionProc()
BEGIN

 declare pgId int(11); 
 declare pGuid varchar(255);
　-- 定義遊標卡尺
 declare done boolean  DEFAULT TRUE;
 -- 獲取數據到遊標卡尺
 DECLARE cur CURSOR FOR select id,qid from tb_question;
-- 打開遊標卡尺
OPEN cur;
　　-- 開始循環
    WHILE done do 
      FETCH cur INTO pgId,pGuid;
                
        update tb_question_item set question_id=pgId where qid= pGuid;
   end while;
CLOSE cur;
END;


CALL questionProc();