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oracle start with connect by prior 递归查询
Oracle中的select语句可以用start with...connect by prior子句实现递归查询,connect by 是结构化查询中用到的,
其基本语法是:
select ... from <TableName>
where <Conditional-1>
start with <Conditional-2>
connect by <Conditional-3>;
<Conditional-1>:过滤条件,用于对返回的所有记录进行过滤;
<Conditional-2>:查询结果重起始根结点的限定条件;
<Conditional-3>:连接条件;
select dept_id ,dept_name,parent_id,stutas ,remark,level as levfrom pub_depart_info where stutas=1start with pub_depart_info.dept_id=‘1001‘connect by prior pub_depart_info.dept_id = pub_depart_info.parent_idorder by pub_depart_info.dept_id
其中:level为关键字,用于显示递归的层书
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