SQL vs NoSQL Databases

Database Types

Relational vs non-relational databases.

SQL

ACID transactions. Fixed schema. Complex queries. Popular: PostgreSQL, MySQL.

NoSQL

Various types: key-value, document, column, graph. Horizontal scaling. Flexible schema.

Use Cases

SQL: structured data, complex queries. NoSQL: flexible schema, high scale.

NewSQL: distributed + ACID: CockroachDB, Spanner.

Key Takeaways

1. SQL: relational, ACID, fixed schema
2. NoSQL: flexible, scalable, various types
3. Choose based on requirements