Amazon DynamoDB
All Things Distributed blog. 2012年1月21日閲覧。
↑ “Amazon Web Services ブログ: 【AWS発表】 Amazon DynamoDBが東京リージョンで利用可能に”. 2014年10月28日閲覧。
↑ Careful design of the sort key lets you retrieve commonly needed groups of related items using range queries with operators AWS - DynamoDB - Developer Guide
↑ Composite sort keys let you define hierarchical (one-to-many) relationships in your data that you can query at any level of the hierarchy. AWS - DynamoDB - Developer Guide