database troubleshooting website

As a personal website user, I need assistance troubleshooting my database that is using SQL. The main issue I'm facing is that php functions are not populating the primary key values properly in the database. I am looking for an experienced individual with in-depth knowledge in database design, architecture and functioning, who can help diagnose the issue and provide a solution to solve it. If you have experience in database optimization, review reports and performance issues, please do apply.