diff --git a/superset/models/helpers.py b/superset/models/helpers.py
index fc947ff577766..df3dd93488ce3 100644
--- a/superset/models/helpers.py
+++ b/superset/models/helpers.py
@@ -1352,7 +1352,13 @@ def values_for_column(self, column_name: str, limit: int = 10000) -> list[Any]:
         tbl, cte = self.get_from_clause(tp)
 
         qry = (
-            sa.select([target_col.get_sqla_col(template_processor=tp)])
+            sa.select(
+                # The alias (label) here is important because some dialects will
+                # automatically add a random alias to the projection because of the
+                # call to DISTINCT; others will uppercase the column names. This
+                # gives us a deterministic column name in the dataframe.
+                [target_col.get_sqla_col(template_processor=tp).label("column_values")]
+            )
             .select_from(tbl)
             .distinct()
         )
@@ -1368,7 +1374,7 @@ def values_for_column(self, column_name: str, limit: int = 10000) -> list[Any]:
             sql = self.mutate_query_from_config(sql)
 
             df = pd.read_sql_query(sql=sql, con=engine)
-            return df[denormalized_col_name].to_list()
+            return df["column_values"].to_list()
 
     def get_timestamp_expression(
         self,