各列定义不明

Question

我得到了：

  

ORA-00918：列模糊定义   00918. 00000 - “栏目含糊不清”

每当我尝试跑步时：

select 
first_name as student_first_name, 
last_name as student_last_name

from super_student ss

inner join sub_distance_learning sdl
on sdl.student_id = ss.id

inner join sub_academic_tutor sat
on sat.id = sdl.academic_tutor_id

inner join super_sub_lecturer ssl
on ssl.id = sat.lecturer_id

inner join super_employee se
on se.id = ssl.employee_id;

错误仅在包含此错误时显示：

inner join super_employee se
on se.id = ssl.employee_id;

有什么想法吗？

Answer 1

显然，多个表格中包含first_name和/或last_name，大概是super_student和super_employee。

使用您很好定义的表别名：

select ss.first_name as student_first_name, 
       ss.last_name as student_last_name