diff --git a/bi_sql_editor/migrations/16.0.2.0.0/post-migration.py b/bi_sql_editor/migrations/16.0.2.0.0/post-migration.py
index f30ae4070..2503c9c59 100644
--- a/bi_sql_editor/migrations/16.0.2.0.0/post-migration.py
+++ b/bi_sql_editor/migrations/16.0.2.0.0/post-migration.py
@@ -8,4 +8,7 @@ from openupgradelib import openupgrade
 @openupgrade.migrate()
 def migrate(env, version):
     for view in env["bi.sql.view"].search([("state", "=", "ui_valid")]):
+        # create new Form view
         view.form_view_id = env["ir.ui.view"].create(view._prepare_form_view()).id
+        # Update tree view, to add sum / avg option
+        view.tree_view_id.write(view._prepare_tree_view())
diff --git a/bi_sql_editor/models/bi_sql_view_field.py b/bi_sql_editor/models/bi_sql_view_field.py
index 72deb8fb1..72a53ca5e 100644
--- a/bi_sql_editor/models/bi_sql_view_field.py
+++ b/bi_sql_editor/models/bi_sql_view_field.py
@@ -265,8 +265,14 @@ class BiSQLViewField(models.Model):
         elif self.tree_visibility == "optional_show":
             visibility_text = 'optional="show"'
 
+        operator_text = ""
+        if self.group_operator == "sum":
+            operator_text = f'sum="{_("Total")}"'
+        elif self.group_operator == "avg":
+            operator_text = f'avg="{_("Average")}"'
+
         return (
-            f"""<field name="{self.name}" {visibility_text}"""
+            f"""<field name="{self.name}" {visibility_text} {operator_text}"""
             f""" context="{self.field_context}"/>\n"""
         )