truy vấn động trong thủ tục oracle sử dụng con trỏ

   OPEN cur_out FOR Select IT.SL_NO from ITEM_DETAILS IT where IT.SL_NO in (SELECT REGEXP_SUBSTR(sl,'[^,]+', 1, LEVEL) FROM DUAL CONNECT BY REGEXP_SUBSTR(sl, '[^,]+', 1, LEVEL) IS NOT NULL ) order by IT.SL_NO