SQL Databases:

• Structured data with predefined schema
• ACID compliance
• Vertical scaling
• Complex joins
• Mature ecosystem

NoSQL Databases (MongoDB):

• Flexible schema design
• Horizontal scaling
• Better performance for certain use cases
• Document-based storage matches application objects
• Easier development for modern applications

Choose MongoDB when:

• You need flexible schema
• Rapid development cycles
• Horizontal scaling requirements
• Working with semi-structured data
• Building modern web applications