3 Ajax Queries Created in Wordpress

I need three Ajax queries created in Wordpress to do the following -

1. Display data from the MySql DB (A custom table)
2. Update a field within that table
3. Delete a record from that table

I have created the page and showing the data using normal querying but I would like it to use ajax to prevent page reload.

Code must be clean and commented and I need today.

Can give you the logins/ftp to the test site