摘要:     Oracle “CONNECT BY”是层次查询子句,一般用于树状或者层次结果集的查询。其语法是: The start with .. connect by clause can be used to select data that has a hierarchical relationship (usually some sort of parent-&... 阅读全文
posted @ 2010-08-03 14:44 lettoo 阅读(64153) 评论(5) 推荐(11) 编辑