DOC: Complete IO/SQL part.

- Change the title.
- List other functions of the module 'io.sql'.

Author: Damien Garaud

doc/source/io.rst

@@ -1428,8 +1428,8 @@ These, by default, index the three axes ``items, major_axis, minor_axis``. On an
 
 .. _io.sql:
 
-DataBase Queries
-----------------
+SQL Queries
+-----------
 
 The :mod:`pandas.io.sql` module provides a collection of query wrappers to both
 facilitate data retrieval and to reduce dependency on DB-specific API. There
@@ -1510,12 +1510,16 @@ Of course, you can specify more "complex" query.
    cu.close()
    cnx.close()
 
-.. note::
 
-   For now, writing your DataFrame into a database works only with
-   SQLite. Moreover, the index will currently be dropped.
+There are a few other available functions:
 
-.. todo::
+  - ``tquery`` returns list of tuples corresponding to each row.
+  - ``uquery`` does the same thing as tquery, but instead of returning results,
+    it returns the number of related rows.
+  - ``write_frame`` writes records stored in a DataFrame into the SQL table.
+  - ``has_table`` checks if a given SQLite table exists.
 
-   - methods list
+.. note::
 
+   For now, writing your DataFrame into a database works only with
+   **SQLite**. Moreover, the **index** will currently be **dropped**.