SQL databases store data in relational tables with schemas, joins, and ACID transactions. NoSQL databases use flexible document, key-value, wide-column, or graph models that scale horizontally and often favor availability over strict consistency.
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SQL databases store data in relational tables with schemas, joins, and ACID transactions. NoSQL databases use flexible document, key-value, wide-column, or graph models that scale horizontally and often favor availability over strict consistency.
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Schemas, joins, and ACID transactions suit complex, consistent, well-structured data.
Flexible schemas and horizontal scale suit high write volume and evolving or denormalized data.
Pick based on access patterns, consistency needs, and scale rather than on trends.
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When you need flexible schemas, very high write throughput, or easy horizontal scaling and can accept eventual consistency.
Many now offer limited or document-level transactions, though not always the full multi-row ACID guarantees of relational systems.
