巡考监考优化

themis-business/src/main/resources/mapper/TOeExamRecordMapper.xml

@@ -1039,7 +1039,7 @@
         and t.client_websocket_status = 'ON_LINE'
         union all
         select
-        count(1) as c
+        count(distinct t.exam_student_id) as c
         from
         t_oe_exam_record t
         left join t_e_exam_student s on