SQL (Structured Query Language) is the standard language for interacting with relational databases. SQL allows developers to query, insert, update, and delete data, as well as define schemas, indexes, and constraints. SQL is declarative, meaning developers specify what data they want rather than how to retrieve it.
Why it matters
SQL is essential for backend development, analytics, data modeling, and system integrations. Understanding SQL enables you to write efficient queries, design strong schemas, and work effectively with relational databases.
Examples
Running SELECT * FROM users WHERE id = 1, creating tables, or joining datasets. Lessons like SQL vs NoSQL Databases provide deeper context.