diff --git a/src/main/java/com/njcn/influx/constant/InfluxDbSqlConstant.java b/src/main/java/com/njcn/influx/constant/InfluxDbSqlConstant.java
index 080eff9..007f686 100644
--- a/src/main/java/com/njcn/influx/constant/InfluxDbSqlConstant.java
+++ b/src/main/java/com/njcn/influx/constant/InfluxDbSqlConstant.java
@@ -91,7 +91,8 @@ public interface InfluxDbSqlConstant {
     String COUNT = "COUNT";
     String MAX = "MAX";
     String MIN = "MIN";
-    String AVG = "MEAN";
+    String AVG = "AVG";
+    String MEAN = "MEAN";
     String CP95 = "CP95";
     String MEDIAN = "MEDIAN";
     String MODE = "MODE";