课堂考试列表没有学生提交的也显示

sclass/src/main/resources/mapper/classroom/ClassroomMapper.xml

@@ -384,7 +384,7 @@
         LEFT JOIN t_classroom_paper_student ps ON p.paperid=ps.paperid
         LEFT JOIN t_classroom_askteacher rt ON p.paperid=rt.paperid
         LEFT JOIN t_classroom c ON rt.roomid=c.roomid
-        WHERE c.roomid=#{roomid} GROUP BY ps.paperid
+        WHERE c.roomid=#{roomid} GROUP BY p.paperid
     </select>
 
     <!--班级学生列表-->