摘要: select …,level from tablename start with 条件1 connect by 条件2 where 条件3order by level desc ; start with 子句:遍历起始条件,有个小技巧,如果要查父结点,这里可以用子结点的列,反之亦然。 connect 阅读全文
posted @ 2017-10-28 09:42 酸奶加绿茶 阅读(215) 评论(0) 推荐(0)