Database

A database is a system that contains a collection of structured, related data and is used for digital data management. It enables organizations to store, query, update, and analyze large volumes of data.

Data is often stored in tables consisting of rows and columns. A Database Management System (DBMS) is used to create, manage, and query this data. The DBMS acts as an interface between users and the underlying data.

Through queries, for example using SQL, data can be specifically created, read, updated, and deleted. The database processes requests, accesses the stored data, and returns the required results. At the same time, the DBMS ensures that data is stored consistently, access is controlled, and unnecessary redundancies are avoided.

Types of Databases

• Relational database: Structures data in tables with defined relationships, for example MySQL.
• NoSQL database: Stores data flexibly, for example as documents or key-value pairs.
• Hierarchical database: Organizes data in tree-like structures.
• Distributed database: Distributes data across multiple systems or locations.

Practical Examples

• A website stores user data.
• An online shop manages products and orders.
• An app accesses a database to display content.
• A company analyzes customer data to support business decisions.