concat( td.universities_colleges_province, universities_colleges_city ) AS universities_colleges_address,
(
SELECT
replace(GROUP_CONCAT(class_name), ',', '、')
FROM
school_class ab
WHERE
ab.class_id IN (
SELECT DISTINCT
a.school_class_id
FROM
teacher_open_course_merge_school_class a
WHERE
a.teacher_open_course_id IN ( SELECT DISTINCT teacher_open_course_id FROM teacher_open_course_merge_teacher b WHERE b.teacher_id = t.teacher_id ))) AS class_names
FROM
teacher t
INNER JOIN university_system tb ON tb.university_system_id = t.university_system_id
AND tb.university_system_status = 1
INNER JOIN university_faculty tc ON tc.university_faculty_id = t.university_faculty_id
AND tc.university_faculty_status = 1
INNER JOIN universities_colleges td ON td.universities_colleges_id = t.universities_colleges_id