结束批阅部分班级某些试题收到人数为0报错

sstudy/src/main/resources/mapper/question/QuestionClassMapper.xml

         from t_paper_qtype_question ptq left join t_question q on ptq.questionid=q.questionid
         left join t_paper_student_question psq on ptq.paperid = psq.paperid and ptq.questionid=psq.questionid and psq.classid=#{classid}
         where ptq.paperid=#{paperid}
-        group by ptq.questionid order by ptq.ptqorder
+        group by ptq.questionid having stunum!=0 order by ptq.ptqorder
     </select>
     <!--答题卡作业统计按题-->
     <select id="getSQuestionAnalyze" resultType="com.xhkjedu.sstudy.model.question.TQuestionClass">