limit 1

src/main/resources/mapper_dao/TrainCardDao.xml

@@ -116,5 +116,7 @@
             AND c.created_at > FROM_UNIXTIME(#{startTime}, '%Y-%m-%d %H:%i:%s')
             AND e.rec_status = 0
             AND c.rec_status = 0
+        order by c.id desc
+        limit 1
     </select>
 </mapper>