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Web Development
A database is an organised store of data, such as users, products, and orders, that applications read and write reliably and quickly.
Relational databases like PostgreSQL and MySQL store data in tables linked by keys and are queried with SQL. Document databases like MongoDB store flexible JSON-like records.
Backups, access controls, and indexes keep a database safe and fast as data grows.
Example
An online store's database holds tables for customers, products, and orders, each order linked to its customer and items.
Why it matters
Almost every real web application depends on a database, and its design affects speed, reliability, and security.
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Web Development
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