Almost every app stores information. A database is where that information lives in an organised form.
What is a Database?
A database is a structured collection of data. A database management system (DBMS) allows users to store, retrieve and manage that data.
Why Databases Matter
They keep data organised, secure and consistent, and allow many users to access information at the same time.
Types of Databases
- Relational (SQL): Data in tables, e.g. MySQL, PostgreSQL.
- NoSQL: Flexible formats, e.g. MongoDB.
- Key-value stores: Fast lookups, e.g. Redis.
Common Examples
- MySQL and PostgreSQL for websites.
- Oracle for large enterprises.
- MongoDB for flexible documents.
- SQLite for mobile apps.
What is SQL?
SQL (Structured Query Language) is the standard language used to create, read, update and delete data in relational databases.
Why Learn Databases?
Every modern app needs data storage. Database skills are essential for web developers, data analysts and software engineers.
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