What criteria should be considered when choosing a database management system for a project?

When choosing a database management system (DBMS) for a project, several key criteria should be considered:

1. Type of data and structure: Relational (SQL) or non-relational (NoSQL) databases, depending on data structure and relationship requirements.
2. Scalability: How easily the DBMS can scale horizontally or vertically as data volume and load grow.
3. Performance: Response time and query processing speed, especially for critical operations.
4. Reliability and fault tolerance: Backup, replication, and recovery mechanisms.
5. Transaction support: If data integrity and ACID compliance are important.
6. Ecosystem and support: Availability of drivers, tools, documentation, and community.
7. Cost: Licensing, maintenance, and infrastructure expenses.
8. Compatibility with tech stack: Ease of integration with used languages and frameworks.

Example: PostgreSQL suits projects with structured data and complex queries, while MongoDB is better for large volumes of unstructured data.