Merge remote-tracking branch 'origin/master'

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

@@ -526,7 +526,7 @@
 
     <select id="countEduCourseHomeworkList" resultType="int">
         SELECT
-            COUNT(cs.id_)
+            COUNT(DISTINCT cs.id_)
         FROM
             course_homework ch
             LEFT JOIN music_group mg ON mg.id_ = ch.music_group_id_