3 files changed, 30 insertions, 5 deletions
diff --git a/lib/sqlalchemy/sql/compiler.py b/lib/sqlalchemy/sql/compiler.py
index 3e62cb350..97397e9cf 100644
--- a/lib/sqlalchemy/sql/compiler.py
+++ b/lib/sqlalchemy/sql/compiler.py
@@ -3760,7 +3760,6 @@ class SQLCompiler(Compiled):
             "_label_select_column is only relevant within "
             "the columns clause of a SELECT or RETURNING"
         )
-
         if isinstance(column, elements.Label):
             if col_expr is not column:
                 result_expr = _CompileLabel(
@@ -4416,9 +4415,27 @@ class SQLCompiler(Compiled):
         populate_result_map: bool,
         **kw: Any,
     ) -> str:
+
         columns = [
-            self._label_returning_column(stmt, c, populate_result_map, **kw)
-            for c in base._select_iterables(returning_cols)
+            self._label_returning_column(
+                stmt,
+                column,
+                populate_result_map,
+                fallback_label_name=fallback_label_name,
+                column_is_repeated=repeated,
+                name=name,
+                proxy_name=proxy_name,
+                **kw,
+            )
+            for (
+                name,
+                proxy_name,
+                fallback_label_name,
+                column,
+                repeated,
+            ) in stmt._generate_columns_plus_names(
+                True, cols=base._select_iterables(returning_cols)
+            )
         ]
 
         return "RETURNING " + ", ".join(columns)
diff --git a/lib/sqlalchemy/sql/dml.py b/lib/sqlalchemy/sql/dml.py
index 5145a4a16..2d3e3598b 100644
--- a/lib/sqlalchemy/sql/dml.py
+++ b/lib/sqlalchemy/sql/dml.py
@@ -59,6 +59,7 @@ from .selectable import FromClause
 from .selectable import HasCTE
 from .selectable import HasPrefixes
 from .selectable import Join
+from .selectable import SelectLabelStyle
 from .selectable import TableClause
 from .selectable import TypedReturnsRows
 from .sqltypes import NullType
@@ -399,6 +400,9 @@ class UpdateBase(
     ] = util.EMPTY_DICT
     named_with_column = False
 
+    _label_style: SelectLabelStyle = (
+        SelectLabelStyle.LABEL_STYLE_DISAMBIGUATE_ONLY
+    )
     table: _DMLTableElement
 
     _return_defaults = False
diff --git a/lib/sqlalchemy/sql/selectable.py b/lib/sqlalchemy/sql/selectable.py
index 9de015774..488dfe721 100644
--- a/lib/sqlalchemy/sql/selectable.py
+++ b/lib/sqlalchemy/sql/selectable.py
@@ -2193,7 +2193,9 @@ class SelectsRows(ReturnsRows):
     _label_style: SelectLabelStyle = LABEL_STYLE_NONE
 
     def _generate_columns_plus_names(
-        self, anon_for_dupe_key: bool
+        self,
+        anon_for_dupe_key: bool,
+        cols: Optional[_SelectIterable] = None,
     ) -> List[_ColumnsPlusNames]:
         """Generate column names as rendered in a SELECT statement by
         the compiler.
@@ -2204,7 +2206,9 @@ class SelectsRows(ReturnsRows):
         _column_naming_convention as well.
 
         """
-        cols = self._all_selected_columns
+
+        if cols is None:
+            cols = self._all_selected_columns
 
         key_naming_convention = SelectState._column_naming_convention(
             self._label_style