diff --git a/das/src/main/java/com/das/modules/data/service/TDEngineService.java b/das/src/main/java/com/das/modules/data/service/TDEngineService.java
index 460805dc..affaf740 100644
--- a/das/src/main/java/com/das/modules/data/service/TDEngineService.java
+++ b/das/src/main/java/com/das/modules/data/service/TDEngineService.java
@@ -528,7 +528,7 @@ public class TDEngineService {
 
             sb.append("select _WSTART, _WEND");
             fieldList.forEach(field ->
-                    sb.append(" ,").append(calFunction).append("(").append(field).append(") ")
+                    sb.append(" ,").append(calFunction).append("(").append(field).append(") ").append("as ").append(field)
             );
             sb.append(" from ");
             sb.append(tbName);
@@ -591,7 +591,7 @@ public class TDEngineService {
 
             sb.append("select _WSTART, _WEND");
             fieldList.forEach(field ->
-                    sb.append(" ,").append(calFunction).append("(").append(field).append(") ")
+                    sb.append(" ,").append(calFunction).append("(").append(field).append(") ").append("as ").append(field)
             );
             sb.append(" from ");
             sb.append(tbName);