Extra in docs

README.rst

@@ -41,7 +41,9 @@ Using it
    
    "SELECT * FROM users WHERE ((nombre='jose') AND (fecha<=now())) ORDER BY nombre, fecha DESC LIMIT 10"
 
-   
+   Queryset("usuarios").values("name").extra({'select': 'count(*) as total'})
-  str(sql) will result an string with the sql generated
+   "SELECT name , count(*) as total FROM usuarios"
+   
+