how to create tables for already present websites

If you want to create tables for already present website,
for eg,
if you want to add one page in "xyz.com" and store it in the database, then you have to create table for that page.
To create table:
goto xyz.com/cpanel/
and select MySql databases->phpMyadmin.
In phpMyadmin page select the database to which you want to create table and select SQL option, you will get a textarea to type your query ie,
create table table-name("your table fields");
then select "GO".
Now your table will be added to the database for the website "xyz.com".