diff --git a/backend/src/main/java/io/dataease/provider/sqlserver/SqlserverQueryProvider.java b/backend/src/main/java/io/dataease/provider/sqlserver/SqlserverQueryProvider.java
index 37d0ec4881..a9a07b1ce0 100644
--- a/backend/src/main/java/io/dataease/provider/sqlserver/SqlserverQueryProvider.java
+++ b/backend/src/main/java/io/dataease/provider/sqlserver/SqlserverQueryProvider.java
@@ -37,6 +37,7 @@ public class SqlserverQueryProvider extends QueryProvider {
 
     @Override
     public Integer transFieldType(String field) {
+        field = field.toUpperCase();
         switch (field) {
             case "CHAR":
             case "NCHAR":