AWS DynamoDB

Amazon DynamoDB is a fully managed NoSQL key-value and document database. It delivers single-digit millisecond latency at any scale with automatic scaling, built-in security, and zero operational overhead.

Core Concepts

• Table — a collection of items (rows)
• Partition Key (PK) — required primary key for distributing data
• Sort Key (SK) — optional, enables range queries within a partition
• GSI — Global Secondary Index, alternate PK/SK for different access patterns
• LSI — Local Secondary Index, same PK but different SK (must be created at table creation)
• Streams — ordered log of item changes for event-driven processing
• TTL — automatic item expiration

Creating Tables