diff --git a/psdc-business/src/main/resources/mapper/business/PsdcElectricHtdataMapper.xml b/psdc-business/src/main/resources/mapper/business/PsdcElectricHtdataMapper.xml
index f1359b9..6d9080d 100644
--- a/psdc-business/src/main/resources/mapper/business/PsdcElectricHtdataMapper.xml
+++ b/psdc-business/src/main/resources/mapper/business/PsdcElectricHtdataMapper.xml
@@ -88,7 +88,7 @@
 
 
     <select id="selTodayUseEnergy" resultType="java.lang.Double">
-        Select NULLIF(SUM(use_deiffen), 0.0) From psdc_electric_htdata
+        Select IFNULL(SUM(use_deiffen), 0.0) From psdc_electric_htdata
         <where>
             <if test="deviceId != null and deviceId != ''">
                 device_id = #{deviceId}