diff --git a/django/core/management.py b/django/core/management.py
index 1656b00c9a..1cd3753740 100644
--- a/django/core/management.py
+++ b/django/core/management.py
@@ -1653,7 +1653,8 @@ def execute_from_command_line(action_mapping=DEFAULT_ACTION_MAPPING, argv=None):
             parser.print_usage_and_exit()
         if action not in NO_SQL_TRANSACTION:
             from django.db import backend
-            print style.SQL_KEYWORD(backend.get_start_transaction_sql())
+            if backend.get_start_transaction_sql():
+                print style.SQL_KEYWORD(backend.get_start_transaction_sql())
         for mod in mod_list:
             if action == 'reset':
                 output = action_mapping[action](mod, options.interactive)
diff --git a/django/db/backends/oracle/base.py b/django/db/backends/oracle/base.py
index 027eca2050..e220c08ddf 100644
--- a/django/db/backends/oracle/base.py
+++ b/django/db/backends/oracle/base.py
@@ -49,18 +49,17 @@ class DatabaseWrapper(local):
         # set oracle date to ansi date format
         cursor.execute("ALTER SESSION SET NLS_DATE_FORMAT = 'YYYY-MM-DD'")
         cursor.execute("ALTER SESSION SET NLS_TIMESTAMP_FORMAT = 'YYYY-MM-DD HH24:MI:SS.FF'")
+        if settings.DEBUG:
+            return util.CursorDebugWrapper(cursor, self)
         return cursor
 
     def _commit(self):
         if self.connection is not None:
-            self.connection.commit()
+            return self.connection.commit()
 
     def _rollback(self):
         if self.connection is not None:
-            try:
-                self.connection.rollback()
-            except Database.NotSupportedError:
-                pass
+            return self.connection.rollback()
 
     def close(self):
         if self.connection is not None:
@@ -169,7 +168,7 @@ def get_max_name_length():
     return 30
 
 def get_start_transaction_sql():
-    return ""
+    return None
 
 def get_autoinc_sql(table):
     # To simulate auto-incrementing primary keys in Oracle, we have to