Web applications usually consist among other things of list of products or other items that are stored in a database and are indexed. SQL databases are very often used to store data from these simple web applications and also from more advanced apps. Web programmers use either a MySQL database or a MSSQL database to store web application data. When we have a list of products that we want our visitors to interact with, there is a nice feature that can be added to products or items and that is related products that can be implemented using a simple Related Products Query. Related products are items from our SQL database that share some similarities with the product or item our web site visitor is currently viewing. With this technique we can offer our visitors other relevant products based on their interests and thus increase product sales, page impressions, conversion rates or some other parameters that can benefit our web site monetization. If we want to be able to find similarities between our products we need to have a way to mark their properties, so we can tell our database in a MySQL query what to return.
Adding a list of related products to your web site or web application is very easy to implement. For starters, you need to look at your MySQL database structure and create some sample tables. For this example I will be using three database tables, one to hold my products, one to hold a list of tags that I will tag the products with and one to connect the two together.