August 2014
Beginner to intermediate
236 pages
5h 7m
English
Content preview from Mastering DynamoDBBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Secondary indexes
A primary key attribute allows us to create, maintain, and access data efficiently. To do so, DynamoDB creates indexes on those primary attributes as we have seen in the previous section. However, sometimes there might be a need to search and access items from attributes that are not part of the primary key. For all such needs, DynamoDB supports secondary indexes that can be created on attributes other than the primary key and can be accessed and searched in a manner similar to the primary key.
A secondary index contains a subset of attributes from the given table having an alternative key to support query operations. Secondary index allows users to search attributes other than the primary key, which makes DynamoDB useful for ...
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