link to batch clause from Raw docs page

docs/src/piccolo/query_types/raw.rst

@@ -7,15 +7,26 @@ Should you need to, you can execute raw SQL.
 
 .. code-block:: python
 
-    >>> await Band.raw('select name from band')
+    >>> await Band.raw('SELECT name FROM band')
     [{'name': 'Pythonistas'}]
 
 It's recommended that you parameterise any values. Use curly braces ``{}`` as
 placeholders:
 
 .. code-block:: python
 
-    >>> await Band.raw('select * from band where name = {}', 'Pythonistas')
+    >>> await Band.raw('SELECT * FROM band WHERE name = {}', 'Pythonistas')
     [{'name': 'Pythonistas', 'manager': 1, 'popularity': 1000, 'id': 1}]
 
 .. warning:: Be careful to avoid SQL injection attacks. Don't add any user submitted data into your SQL strings, unless it's parameterised.
+
+
+-------------------------------------------------------------------------------
+
+Query clauses
+-------------
+
+batch
+~~~~~
+
+See :ref:`batch`.