Choosing a database is an important decision for project success. SQL and NoSQL — two main approaches. PostgreSQL, MongoDB — most popular.
SQL (Relational Databases)
PostgreSQL, MySQL, SQLite. Tables and relations. ACID transactions. Schema required. Ideal for complex relations, financial apps, e-commerce.
NoSQL
MongoDB, Redis, Firebase. Flexible structure. High scalability. No schema. For large data volumes, real-time apps, IoT.
How to choose?
Data structure is clear → SQL. Rapidly changing structure → NoSQL. Complex queries → SQL. High scalability → NoSQL. Often both can be used together!
Conclusion
Choose based on project requirements. Many projects use both.
Source: MongoDB vs MySQL, MDN SQL
