SQL databases (PostgreSQL, MySQL): structured tables with relations, ACID transactions, powerful queries with JOINs. Best for: structured data, financial systems, complex relationships. NoSQL databases (MongoDB, DynamoDB, Redis): flexible schemas, horizontal scaling, various data models (document, key-value, graph). Best for: unstructured data, high-write workloads, rapid prototyping. The trend: PostgreSQL handles most NoSQL use cases (JSON columns, full-text search), making it the default choice for most applications.
comparison2 min read
SQL vs NoSQL
Compare relational (SQL) and non-relational (NoSQL) databases.
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