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🗄️ What is a database?

A database is an organized system that allows saving, modifying, deleting, and querying large amounts of information quickly and securely.
It is designed to store data in a structured way, facilitating efficient and accurate access to information.

Formal definition​

A database is a set of data that belongs to the same context and is systematically stored for later use.
They are usually managed by specialized software called a Database Management System (DBMS).

Simple example​

Imagine a contact book: each page contains a person's name, number, and address.
In a digital database, that information is organized into tables, and each person would be a record.

What is a database used for?​

  • Save information permanently and orderly.
  • Allow quick searches and updates.
  • Manage large volumes of information.
  • Protect data against loss or unauthorized access.
  • Share information between multiple users or systems.

Where do we find databases?​

  • Banks (accounts, transactions)
  • Social networks (profiles, messages)
  • Hospitals (medical records, appointments)
  • Companies (customers, inventories, sales)
  • Mobile apps and websites