Sql -- 练习3 递归查询

相关表信息

问题

这是一个树结构，查询教师“胡明星”的所有主管及姓名:（无主管的教师也需要显示），显示（教师编号、教师名称、主管编号、主管名称)

解决1

SELECT ht1.teacher_no,         ht1.teacher_name,         ht1.manager_no,         ht2.teacher_name manager_name    FROM hand_teacher ht1,         hand_teacher ht2   WHERE ht1.manager_no = ht2.teacher_no(+)   START WITH ht1.teacher_name = '胡明星' CONNECT BY PRIOR ht1.manager_no = ht1.teacher_no;

解决2

select * from HAND_TEACHER  start with teacher_name='胡明星' connect by teacher_no=prior manager_no

结果