January 2019
Intermediate to advanced
490 pages
15h 37m
English
Content preview from Serverless Programming Cookbook
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Reading data from DynamoDB
DynamoDB supports three ways of querying data:
- Read the exact item using get-item, providing all the keys.
- Read the items using a query, providing at least the partition key. You may also provide a sort key and/or a filter expression.
- Read the items using a scan, providing a filter expression.
Each of these ways support strongly consistent reads, using an additional option of consistent-read. The default is eventual consistency. By default, all attributes are returned in a read operation. You can use a ProjectionExpression parameter to specify which attributes need to be returned.
The following are some of the important characteristics of get-item:
- We cannot use get-item against a local or global secondary ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.