update

mec-biz/src/main/resources/config/mybatis/StudentMapper.xml

@@ -236,7 +236,7 @@
     </sql>
 
     <select id="queryByOperatingTag" resultMap="Student">
-        SELECT operating_tag_,operating_tag_,user_id_,tenant_id_
+        SELECT operating_tag_,user_id_,tenant_id_
         FROM student
         WHERE operating_tag_ = #{operatingTag}
     </select>