select user_id as id,student_name as name,student.class_id as classId,school_class.class_name as className,student_sn as studentNo from student join school_class on student.class_id=school_class.class_id where student.class_id in (#classIds#)
SELECT
student.user_id AS id,
student_name AS NAME,
student.class_id AS classId,
school_class.class_name AS className,
student_sn AS studentNo,
universities_colleges_name as schoolName
FROM
student
JOIN school_class ON student.class_id = school_class.class_id
JOIN universities_colleges on school_class.universities_colleges_id = universities_colleges.universities_colleges_id