| Aspect | Redis | Relational Database |
|---|---|---|
| Storage | In-memory | Disk-based |
| Data Model | Key-value, NoSQL | Relational tables |
| Schema | Schema-less | Fixed schema |
| ACID | Limited ACID properties | Full ACID compliance |
| Performance | Extremely fast (microseconds) | Slower (milliseconds) |
| Persistence | Optional | Always persistent |
| Query Language | Commands | SQL |
| Relationships | No joins | Complex relationships |
| Use Cases | Caching, sessions, real-time | Complex business logic |
