fix sql

src/main/resources/mapper/StudentMapper.xml

@@ -767,7 +767,7 @@
                stu.campus_code,
                stu.campus_name,
                stu.exam_site,
-               stu.exam_room,
+               stu.exam_room
         from sc_student stu
         where stu.exam_id = #{examId}
           and stu.subject_code = #{subjectCode}