SQL (Structured Query Language)

SQL is a standard language for managing and querying relational databases.

What is SQL?

SQL (Structured Query Language) is a standardized language for managing and manipulating relational databases, used for querying, inserting, updating, and deleting data.

SQL categories

DDL (CREATE, ALTER, DROP), DML (SELECT, INSERT, UPDATE, DELETE), DCL (GRANT, REVOKE), TCL (COMMIT, ROLLBACK).

Common misconceptions

"All SQL is the same" — Dialect differences exist
"NoSQL replaces SQL" — Different use cases
"SQL is outdated" — Still fundamental and widely used