日期:2014-05-17 浏览次数:20709 次
FROM info2 info LEFT OUTER JOIN question_list ql ON info.enq_no = ql.enq_no LEFT OUTER JOIN choice_list cl ON info.enq_no = cl.enq_no AND ql.question_no = cl.question_no
from info2,question_list,choice_list where info.enq_no = ql.enq_no(+) and info.enq_no = cl.enq_no(+) AND ql.question_no = cl.question_no(+)