In what cases is it advisable to use relational databases?

Relational databases (RDBs) are advisable to use when data has a clear structured schema with interconnected tables and there is a need to ensure data integrity, transactional consistency, and support for complex queries.

Typical use cases:

• Accounting systems (financial, warehouse, CRM), where data reliability and consistency are crucial.
• Applications with a large number of relationships between entities (e.g., users, orders, products).
• When complex analytical queries using SQL are required.
• If support for ACID transactions is important to prevent errors during concurrent access.

Example: an online store where information about customers, orders, products, and their relationships needs to be stored.