note 14759 added to function.mysql-create-db.php

How do i make a Field when i already make the table..could someone give me a clue about this, i'm new with PHP currently i'm using PHP 4 the new version, also when i want to create a field using mysql_db_query, the Server says that this command was Depre..bla..bla..bla lah, i don't know, the server told me to use mysql_select_db or Mysql_query but i don't know how, could somebody teach me http://www.php.net/manual/en/function.mysql-create-db.php