1、错误描述

1 queries executed, 0 success, 1 errors, 0 warnings

查询：SELECT stu_name, course, score FROM t_student_info s LIMIT 0, 1000

错误代码： 1054
Unknown column 'course' in 'field list'

执行耗时   : 0 sec
传送时间   : 0 sec
总耗时      : 0 sec

2、错误原因

SELECT
  stu_name,
  course,
  score
FROM
  t_student_info s
  AND t_score_info sc
WHERE s.stu_id = sc.stu_id
GROUP BY stu_id 

无法区别course字段是哪张表的

3、解决办法

SELECT
  s.stu_name,
  sc.course,
  sc.score
FROM
  t_student_info s
  AND t_score_info sc
WHERE s.stu_id = sc.stu_id
GROUP BY stu_id