LU03a - DBS, DBMS, DB

Databases are fundamental to modern information systems, such as Webshops or Banking Applications. This document provides a concise overview of three key terms:

1. DBS: Database System
2. DBMS: Database Management System
3. DB: Database

The following diagram illustrates the interaction of these three terms:

A Database System (DBS) encompasses the database, the DBMS, and associated hardware and software components. It represents the complete environment for managing data.

Components of a DBS

• Database (DB): The stored data itself.
• Database Management System (DBMS): The software for managing the DB.

A database (DB) is a structured collection of data organized for efficient retrieval and management. It stores information in a systematic way, allowing users to access, modify, and analyze data as needed. Basically, it is several Excel spreadsheets that are linked together.

Characteristics of a DB

• Organized: Data is arranged in a logical manner (tables, records, fields).
• Integrated: Data is related and consistent across the database.
• Shared: Multiple users can access and update data simultaneously.
• Controlled: Access to data is managed through security measures.

A Database Management System (DBMS) is software that interacts with users and applications to create, store, modify, and retrieve data from a database. It acts as an intermediary between the user and the database.

Functions of a DBMS

• Data Definition: Creates and modifies the database structure.
• Data Manipulation: Allows users to insert, update, delete, and retrieve data.
• Data Query: Enables users to search and retrieve specific data.
• Data Integrity: Ensures data accuracy and consistency.
• Data Security: Protects data from unauthorized access.
• …

Definition DBS: https://de.wikipedia.org/wiki/Datenbank

Volkan Demir