Oracle SQL

start with....connect by 递归查询树状SQL

Select * from t_tree

where UPPER(is_display) = 'ON'

start with p_node_id =1 --当前节点ID

connect by prior node_id = p_node_id

and level <= 1 --(从父往子递归只查询一级子节点)

order SIBLINGS by display_order