Key Differences Between SQL and NoSQL Databases

SQL (Structured Query Language) and NoSQL databases are two types of database management systems that differ in structure, data model, and usage scenarios.

SQL Databases:

• Follow a fixed schema structure
• Use tables to store data
• Support predefined relationships between tables
• Best suited for complex queries and transactions

NoSQL Databases:

• Schema-less or dynamic schema structure
• Use collections or documents to store data
• Support flexible and dynamic data models
• Best suited for large-scale, distributed data environments

Scenarios for Choosing SQL or NoSQL:

Choose a SQL database when:

• Working with structured data that requires complex queries
• Need for strong consistency and ACID transactions

Choose a NoSQL database when:

• Dealing with unstructured or semi-structured data
• Scalability and high availability are critical
• Flexibility in data models and schema design is required