diff --git a/lidee-service/lidee-iot-service/src/main/resources/mapper/iot/DevGzbxWxgdMapper.xml b/lidee-service/lidee-iot-service/src/main/resources/mapper/iot/DevGzbxWxgdMapper.xml
index 0df5fba..8741921 100644
--- a/lidee-service/lidee-iot-service/src/main/resources/mapper/iot/DevGzbxWxgdMapper.xml
+++ b/lidee-service/lidee-iot-service/src/main/resources/mapper/iot/DevGzbxWxgdMapper.xml
@@ -73,18 +73,15 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 
 
     <select id="deviceLogList"  resultType="iot.lidee.iot.domain.DeviceLog">
-
-        SELECT
-               *
-        FROM (
-                 SELECT *,
-                        ROW_NUMBER() OVER (PARTITION BY identity ORDER BY create_time DESC) AS rn
-                 FROM
-                      iot_device_log
-                 WHERE
-                       serial_number = #{serialNumber}
-             ) t
-        WHERE rn = 1
+        SELECT l1.*
+        FROM iot_device_log l1
+                 INNER JOIN (
+            SELECT identity, MAX(create_time) AS max_time
+            FROM iot_device_log
+            WHERE serial_number = #{serialNumber}
+            GROUP BY identity
+        ) l2 ON l1.identity = l2.identity AND l1.create_time = l2.max_time
+        WHERE l1.serial_number = #{serialNumber};
     </select>
 
 </mapper>