diff --git a/src/main/java/com/njcn/influx/query/InfluxQueryWrapper.java b/src/main/java/com/njcn/influx/query/InfluxQueryWrapper.java
index 068021f..6c90b6b 100644
--- a/src/main/java/com/njcn/influx/query/InfluxQueryWrapper.java
+++ b/src/main/java/com/njcn/influx/query/InfluxQueryWrapper.java
@@ -555,7 +555,8 @@ public class InfluxQueryWrapper {
                 columnName +
                 InfluxDbSqlConstant.DQM +
                 InfluxDbSqlConstant.RBK +
-                resultName;
+                resultName +
+                StrPool.C_SPACE;;
         selectColumns.add(selectFragment);
         return this;
     }