December 2017
Intermediate to advanced
404 pages
9h 28m
English
Content preview from Cloud Native Programming with Golang
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Secondary indexes
Primary keys in DynamoDB provide efficient and fast access to items in tables, when we query the items via their primary keys. However, there are a lot of scenarios where we may want to query items in tables via attributes other than the primary keys. DynamoDB allows us to create secondary indexes that target attributes different than primary key attributes. These indexes enable us to run efficient queries on nonprimary key items.
A secondary index is nothing more than a data structure that contains a subset of attributes from a table. A table is allowed to have multiple secondary indexes, which provides flexibility when querying data from tables.
In order to further understand secondary queries, we will need to cover some ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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