oracle 递归查询父子关系记录
摘要:
select lpad(' ',4*(level-1))||t.project_id project_id,t.parent_project_id from PC_PROJECT_ASSOC t start with project_id='xRFv29ZYbE'connect by prior project_id = parent_project_idstrat with 指定层次开始的条件,即是说满足这个条件的行即可以做为层次树的最顶层 connect by prior指层之间的关联条件,即什么样的行是上层行的子行(自连接条件) 阅读全文
posted @ 2011-08-23 21:40 kafony 阅读(651) 评论(0) 推荐(1) 编辑