Structured Query Language (SQL) is the language of relational databases. Relational databases power the backend architecture of websites and applications, as well as internal software for any organization. All relational databases use SQL, but syntax can be nuanced based on the platform that you use. The three main platforms are Microsoft SQL Server, MySQL, and Oracle. There are several others on the market, but to help you get an idea of how to budget for your next SQL developer project, we’ll focus on the top three platforms.
It’s important to note that big data databases use a different structure and language. NoSQL is used for big data databases, and this article focuses on relational, SQL databases. The structure and architecture for a big data project is much different, so you need to determine which kind of platform you want to use before you build your product.
Cost Factor #1: Scope
Poor database design and development can hurt software performance and hinder scalability, so you’ll need a dedicated SQL programmer who can ensure your design is efficient and optimized from the start.
As with any software development project, scope is always a huge cost factor. It’s often difficult to understand the scope up of a project—especially where database design is concerned. Database-related estimation can be more difficult because it’s often a total unknown to a non-developer. It’s easy to see front-end development and scope out functionality because we interact with it directly on a daily basis; database design, logic, and programming, however, are all the invisible parts of the product.
The scope of a database project is usually proportional to the scope of the front-end software product, but this is a general rule of thumb and not always absolutely true. The database design usually gets more complex when you need more data and queries to review that data. For instance, a blog database can be complex due to all of the content, permissions, users and features needed to run the blog. However, the front-end of a blog is usually much less complex to the user. This is an example of larger scope that most clients can’t estimate.
The best way to determine the complexity of your relational database project scope is to lay out the amount of data and features you need from your software. Complex software usually requires a complex database solution.
Cost Factor #2: Scalability
Another topic you may struggle to estimate when hiring a developer for your SQL project is the scalability component. Scalability is your database and software’s ability to grow with new features and design without disrupting current features. You should be able to add features to your database without having a complete overhaul of the system.
You normally don’t need to specify that you want a scalable database—the SQL developer should make an effort to create a database that’s scalable from the get-go. However, you can specify that you want a database that you can extend upon should the software grow and need feature enhancements.
Source:: Business 2 Community