MySQL is a widely used open-source relational database that stores data in structured tables with rows and columns. It supports the SQL query language, ACID-compliant transactions, indexing, and replication. MySQL powers millions of applications, from small websites to large enterprise systems, due to its reliability, performance, and strong ecosystem.
Why it matters
MySQL is a foundational tool for backend and full-stack developers. Understanding it helps teams design efficient schemas, optimize queries, and build scalable systems. MySQL integrates seamlessly with ORMs, cloud providers, and containerized environments.
Examples
Using MySQL to store user accounts, orders, or application logs. Lessons like What Is a Database? and Indexes Explained reinforce core concepts.