A database is an organized collection of electronic data managed by a Database Management System (DBMS). It provides efficient storage, retrieval, updates, and administration for applications ranging from embedded devices to large-scale enterprise services.

Common types/models:

• Relational (RDBMS): Structured tables with ACID transactions (e.g., PostgreSQL, MySQL).
• NoSQL : Key-value, document, column-family, and graph databases optimized for scale and flexible schemas.
• In-memory : Data kept in RAM for low-latency access (e.g. Redis).
• Distributed : Partitioned and replicated for scale and resilience.

Databases are the foundation of software systems—storing, protecting, and enabling access to critical data. The database choice shapes performance, scalability, consistency, and maintainability.

Key advantages of well-designed database choice:

• Predictable performance and transactional integrity for critical workloads.
• Scalable, highly available architectures for modern distributed appss.
• Flexible data models to support evolving application requirements.
• Optimized cost and resource utilization when tuned to workload patterns.

• Running Databases on ARM Based Infrastructure
• Databases: Wikipedia
• PostgreSQL Home