diff --git a/xhpc-modules/xhpc-charging-station/src/main/resources/mapper/XhpcChargingStationMapper.xml b/xhpc-modules/xhpc-charging-station/src/main/resources/mapper/XhpcChargingStationMapper.xml
index 2a53c9a0..d9e2f467 100644
--- a/xhpc-modules/xhpc-charging-station/src/main/resources/mapper/XhpcChargingStationMapper.xml
+++ b/xhpc-modules/xhpc-charging-station/src/main/resources/mapper/XhpcChargingStationMapper.xml
@@ -835,7 +835,7 @@
     </select>
 
     <select id="getXhpcRateTimeOrderStatistics" resultType="java.util.Map">
-        select IF(SUM(charging_degree) IS NULL, 0, charging_degree) as chargingDegreeSum,
+        select IF(SUM(charging_degree) IS NULL, 0, SUM(charging_degree)) as chargingDegreeSum,
                COUNT(real_time_order_id)                            as realTimeOrderIdCount,
                COUNT(DISTINCT user_id)                              as userIdCount
         from xhpc_real_time_order