Organizations and businesses have huge amounts of data stored in databases that they need for their operations. Since we moved from filing cabinets to computers, we use databases to handle document storage and retrieval.
A database is a robust piece of software designed to store data on disk in a fast and efficient way. New algorithms and techniques discovered in computer science are eventually implemented in available database software and tuned for the latest storage devices. There have been incredible changes in how the industry handles data, and it isn't stopping any time soon.
Back end developers may need to define the structure for storing data and create methods for reading and writing it when transactions occur. Depending on how the system is structured, we may do that manually in the database, or use a framework that handles it for us.
Learn about computational performance to identify bottlenecks and how to resolve them. For example, selecting too much data to return in a query make take a long time to process and use a lot of memory.