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NoSQL vs SQL NoSQL databases provide flexible data models ideal for diverse data structures and scalability. 1. Key-Value: Simple, uses key-value pairs (e.g., Redis). 2. Document: Stores data in JSON/BSON documents (e.g., MongoDB). 3. Graph: Manages complex relationships with nodes and edges (e.g., Neo4j). 4. Column Store: Optimized for analytics, organizes data by columns (e.g., Cassandra). SQL databases, like RDBMS and OLAP, provide structured, relational storage for traditional and analytical needs 1. RDBMS: Traditional relational databases with tables (e.g., PostgreSQL & MySQL). 2. OLAP: Designed for complex analysis and multidimensional data (e.g., SQL Server Analysis Services).

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