ORACLE中递归遍历

Code_Noting2024-05-28 23:55

--查询全部资源信息
sql 复制代码
select * from urm_class_info
--向上遍历树，找到路径直到根节点，指定的是parentid
sql 复制代码
select distinct classid, parentid, name
  from urm_class_info
 start with parentid = 'cmdb0000000000000017'
connect by prior parentid = classid
--向上遍历树，找到路径直到根节点，指定的是classid，和下面的主要区别就是parentid和classid的位置
sql 复制代码
select classid, parentid, name
  from urm_class_info
 start with classid = 'cmdb0000000000000401'
connect by prior parentid = classid
--向下遍历整棵树，可以指定classid，来遍历指定节点的树
sql 复制代码
select classid, parentid, name
  from urm_class_info
 start with classid = 'cmdb0000000000000017'
connect by prior classid = parentid
--向下遍历整棵树，可以指定parentid，来遍历指定parentid节点的树，不包含parentid
sql 复制代码
select classid, parentid, name
  from urm_class_info
 start with parentid = 'cmdb0000000000000017'
connect by prior classid = parentid