An important step in the process of building a website or web application is the conception of the data structure. Most of the problems that come up during the development of project come from a poorly conceived database. Bad modeling will create superfluous terms, incapacity and lost data. Good modeling makes the project more flexible for possible improvements. The more robust your model is, the less issues you will run intro when you retrieve data through PHP or ASP. It also makes access to the data faster and simpler.