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sql遍历树

oracle有直接的sql来遍历一颗树的子节点和父节点

   遍历一个节点的所有子节点(classid的值就是该节点的值)

 

select *
  from organization_ a
start with a.organizationid = 185137
connect by prior a.organizationid = a.parentorganizationid

  遍历一个节点的所有父节点(classid的值就是该节点的值)

select *
  from organization_ a
start with a.organizationid = 185137
connect by  prior a.parentorganizationid=a.organizationid;

主要区别是classid和parentid 的位置

sql遍历树