I have found a very nice tutorial, how to use PHP, PDO, jQuery and the ajax technology to create, edit and delete records on a database table. I have copied the script and had make an online demo page from this project.
Its like my own German article how to use PHP and Ajax to edit a table on the MySQL database. Its interesting, how different the concepts are to create a editable MySQL table.
Don’t forget to checkout the website from programmerblog.net, there are many good articles.