我无法删除多个表中的所有记录

Question

牙科桌：<​​/ p>

StudentID
Decayed

访问表：

StudentID (This student id can be repeated depends on how many visits they have)
Date
Timein

我的源代码：

DELETE a.*, b.* FROM 
Dental a LEFT JOIN Visits b 
ON b.StudentID = a.StudentID 
WHERE a.StudentID = '11111';