线上bug修改

mec-biz/src/main/resources/config/mybatis/StudentManageDao.xml

@@ -625,6 +625,7 @@
         LEFT JOIN sys_user su ON sr.user_id_ = su.id_
         LEFT JOIN `subject` s ON s.id_ = sr.actual_subject_id_
         LEFT JOIN music_group mg ON sr.music_group_id_ = mg.id_
+        LEFT JOIN student stu ON sr.user_id_ = stu.user_id_
         <if test="classGroupId != null">
             LEFT JOIN class_group_student_mapper cgsm ON cgsm.music_group_id_ = sr.music_group_id_
         </if>