select student.student_sn as studentNo,student.student_name as name,school_class.old_class_id as classId from student join universities_colleges uc on student.org_id = uc.org_id join school_class on student.class_id =school_class.class_id where old_school_id = #schoolId#
select student.student_sn as studentNo,student.student_name as name,school_class.old_class_id as classId from student join universities_colleges uc on student.org_id = uc.org_id join school_class on student.class_id =school_class.class_id where uc.old_school_id = #schoolId#
findAllSonSystemAllBySchoolId
===
select student.student_sn as studentNo,student.student_name as name,school_class.class_id as classId from student join universities_colleges uc on student.org_id = uc.org_id join school_class on student.class_id =school_class.class_id where uc.universities_colleges_id = #schoolId#