diff --git a/src/main/java/com/njcn/influx/query/InfluxQueryWrapper.java b/src/main/java/com/njcn/influx/query/InfluxQueryWrapper.java
index 6c90b6b..7524ae9 100644
--- a/src/main/java/com/njcn/influx/query/InfluxQueryWrapper.java
+++ b/src/main/java/com/njcn/influx/query/InfluxQueryWrapper.java
@@ -555,6 +555,8 @@ public class InfluxQueryWrapper {
                 columnName +
                 InfluxDbSqlConstant.DQM +
                 InfluxDbSqlConstant.RBK +
+                InfluxDbSqlConstant.AS +
+
                 resultName +
                 StrPool.C_SPACE;;
         selectColumns.add(selectFragment);