监考管理，两个场次同时导入多个监考老师，有一个考场列表中无数据，编辑页面显示id修复

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

@@ -12,9 +12,9 @@
         GROUP_CONCAT(tbu.name) as name
         from
         t_b_exam_invigilate_user tbeiu
-        left join t_e_exam tee on
+        join t_e_exam tee on
         tee.id = tbeiu.exam_id
-        left join t_b_user tbu on
+        join t_b_user tbu on
         tbu.id = tbeiu.user_id
         <where>
             <if test="examId != null and examId != ''">