update

edu-user/edu-user-biz/src/main/resources/config/mybatis/ExamRegistrationMapper.xml

@@ -609,6 +609,7 @@
 	</select>
 	<sql id="queryStudentBaseExamsSql">
 		<where>
+			er.subject_id_ != 0
 			<if test="studentId != null">
 				AND er.student_id_ = #{studentId}
 			</if>