A database is an organized collection of data that can be easily accessed, managed, and updated. Databases are the backbone of modern applications, enabling efficient data storage and retrieval.
Why Use a Database?
- Efficient data storage and retrieval
- Data integrity and security
- Scalability for growing data needs
- Concurrency handling for multiple users
- Data analysis and reporting
Types of Databases
- Relational Databases (e.g., MySQL, PostgreSQL, SQL Server):
- Organizes data in tables with rows and columns.
- Uses SQL (Structured Query Language) for querying.
- NoSQL Databases (e.g., MongoDB, Cassandra):
- Schema-less databases.
- Used for unstructured or semi-structured data.
- In-Memory Databases (e.g., Redis, Memcached):
- Optimized for speed; stores data in RAM.
- Cloud Databases (e.g., AWS RDS, Azure Cosmos DB):
- Hosted and managed databases accessible via the internet.