Relational Data Models are the foundation of most database systems. They're based on a simple idea: if you want to get something from your database, you need to know what it is. This might seem like a no-brainer, but it's a pretty radical way of thinking about data. Typically, you'd have a big table of stuff that you can search through and find whatever you want, but with relational data models, you have to first pick out which table has the information you need, then go through that table until you find what you're looking for. That's where the "relations" come in: they provide links between tables so that all their information can be accessed by simply knowing the primary key (or ID) for each record. If one piece of information doesn't exist in one place but elsewhere? Well, it's easy enough for us to use SQL, the standard language for interacting with relational databases, to get all those pieces into one excellent package! Regarding relational database design, there's no such thing as a free lunch. In other words, if you want a database that's easy to use and understand, you'll need to do some hard work first. Fortunately, that hard work is well worth considering the benefits of relational database design. For example, relational database design helps make your data easier to access and query. The structure of your data table makes it easier for users and other programs to find the information they need quickly and easily that means less time wasted searching through databases, saving much money over time! Relational database design isn't just about ease of use. It's also about security and stability. By following strict conventions like those described above, you'll be able to create an environment where your data is safe from harm while still being easily accessible by authorized users, and that's something everyone can appreciate!