📊 9 Key Database Types

🌍 Spatial: Stores and queries location data (PostGIS, MongoDB Spatial).

🔗 Blockchain: Secure, immutable ledgers (BigchainDB, IBM Blockchain).

🌐 Distributed: Scales across servers (Cassandra, Amazon DynamoDB).

⚡️ In-Memory: Lightning-fast access (Redis, Memcached, H2).

🗂 NoSQL: Flexible, schema-free (MongoDB, Couchbase, HBase).

📋 Relational: Structured with tables & SQL (MySQL, PostgreSQL, Oracle).

🧩 Object-Oriented: Models complex objects (db4o, Object DB).

🕸 Graph: Perfect for relationships (Neo4j, Amazon Neptune).

⏱️ Time-Series: Optimized for timestamps (InfluxDB, Prometheus).

Pick the right tool for your data challenge.