Relational Database
A relational database is a type of database that organizes data into structured tables with rows and columns, where relationships between tables are defined using keys. It uses Structured Query Language (SQL) for querying and managing data, ensuring data integrity through constraints like primary keys, foreign keys, and ACID (Atomicity, Consistency, Isolation, Durability) properties. This model is widely used for applications requiring complex queries, transactions, and consistent data storage.
Developers should learn and use relational databases when building applications that require structured data, complex relationships, and transactional integrity, such as e-commerce platforms, banking systems, or enterprise software. They are ideal for scenarios where data consistency, reliability, and the ability to perform joins across tables are critical, making them a foundational skill for backend development and data management.