Database System

I require a database system, coded in Delphi within Lazarus PAscal to search, edit and delete both customers and products. I also require the database system to process client orders coming through the system. The system itself has to be very weak in terms of coding (in respect to the level of coding). The system has to be very basic, with very basic code. I will also require analysis of the code you have used telling me what each part of the code does.