Database
What is Database?
An organized collection of structured data stored and accessed electronically.
Definition
A database is a system for storing, organizing, and retrieving data. Relational databases (PostgreSQL, MySQL) store data in tables with rows and columns. Non-relational databases (MongoDB, Redis) use documents, key-value pairs, or graphs. Database management systems (DBMS) handle storage, querying, indexing, transactions, and access control. Choosing the right database depends on data structure, query patterns, scale, and consistency requirements.