Php MySql查询从树表中获取记录

如果结果在同一个表中，要获取记录的查询是什么

我有这样的桌子：

id uid  name  status    parent
1  1t01 AAA   Teacher   root
2  2s01 CCC   Student   1t01
3  3t02 BBB   Teacher   root
4  4s02 DDD   Student   3t02
5  5s03 EEE   Student   1t01

SELECT t2.name 
FROM yourtable t1, yourtable t2 
WHERE t1.parent = t2.uid 
AND t1.name = 'DDD'; 

我的名字是：DDD，我的名字是：BBB

获取教师姓名的查询：BBB

解决

马丁的回答

---

您可以在表本身上加入，如下所示：

SELECT p.name teacher
FROM table_name t
INNER JOIN table_name p
  ON p.uid = t.parent
WHERE t.name = 'BBB';

---

连接同一个表将执行以下操作：

SELECT t2 .name as teacherName
FROM t1
JOIN t1 AS t2 ON t1.parent = t2.uid
WHERE t1.name = 'BBB';

---

您的查询应如下所示：

id uid  name  status    parent
1  1t01 AAA   Teacher   root
2  2s01 CCC   Student   1t01
3  3t02 BBB   Teacher   root
4  4s02 DDD   Student   3t02
5  5s03 EEE   Student   1t01

SELECT t2.name 
FROM yourtable t1, yourtable t2 
WHERE t1.parent = t2.uid 
AND t1.name = 'DDD'; 

---

将

yourtable

替换为实际的表名。

请给出tearcher表的结构？还有表中用来维护关系的主键吗？