fix

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

@@ -262,7 +262,7 @@
     </select>
 
     <select id="count" resultType="int">
-        select count(1) from class_group_teacher_mapper where class_group_id_ in
+        select count(1) from class_group_teacher_mapper where class_group_teacher_mapper.music_group_id_ in
         <foreach collection="ids" item="id" open="(" close=")" separator=",">
             #{id}
         </foreach>