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• Relational Database (RDBMS) – SQL-based (e.g., MySQL, PostgreSQL, Oracle)
• NoSQL Database – Non-relational (e.g., MongoDB, Cassandra, Redis)
• NewSQL Database – Combines SQL and NoSQL features
• In-Memory Database – Uses RAM for storage (e.g., Redis, Memcached)
• Graph Database – Stores data as nodes and edges (e.g., Neo4j)
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