NoSQL Databases
"Not Only SQL" - alternatives to relational databases.
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LearnStep 1 of 2
NoSQL Databases
Learning Objectives
- •Understand NoSQL types
- •Know when to use NoSQL
Lesson Outline
LearnStep 1/2
NoSQL Databases
json
Examples: MongoDB, CouchDB
Use cases: Content management, catalogs, user profiles
2. Key-Value Stores
Examples: Redis, DynamoDB
Use cases: Caching, sessions, real-time data
3. Column-Family Stores
Examples: Cassandra, HBase
Use cases: Time-series, analytics, IoT
4. Graph Databases
Examples: Neo4j, Amazon Neptune
Use cases: Social networks, recommendations, fraud detection
SQL vs NoSQL
| Aspect | SQL | NoSQL |
|---|---|---|
| Schema | Fixed schema | Flexible/schemaless |
| Scaling | Vertical | Horizontal |
| ACID | Full support | Varies |
| Joins | Built-in | Limited/none |