Computerdatenbank

A computer database is a structured collection of data stored and accessed electronically. It consists of tables, records, and fields, organized to facilitate efficient data retrieval and manipulation. Databases are used in various applications, from simple address books to complex enterprise resource planning systems.

There are two main types of databases: relational and non-relational. Relational databases, such as MySQL and PostgreSQL, use a structured query language (SQL) to manage and manipulate data. They store data in tables with predefined relationships between them. Non-relational databases, also known as NoSQL databases, store data in flexible formats like documents, key-value pairs, or graphs. Examples include MongoDB and Cassandra.

Databases are managed by a database management system (DBMS), which provides tools for creating, reading, updating, and deleting data. The DBMS ensures data integrity, security, and concurrency control, allowing multiple users to access the database simultaneously.

Computer databases play a crucial role in modern computing, enabling efficient data storage, retrieval, and analysis. They are essential components of web applications, mobile apps, and enterprise systems, supporting a wide range of functionalities from user authentication to complex data analytics.