December 2015
Beginner to intermediate
282 pages
5h 36m
English
book
Learning Qlik Sense®: The Official Guide - Second Edition
by Christopher Ilacqua, Henric Cronström, James Richardson
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Structuring your data
In a database, there are rules about where different entities are stored. For instance, everything about the customers should be stored in the Customers table. A customer identifier is stored in this table, which means that the necessary data can be retrieved by a simple lookup in the Customers table. So, if you need to refer to a customer from another table, you just store this identifier in the other table.
Normalization
The identifier needs to be unique in the Customers table, so that every record can be addressed. Here the field is called a primary key. In other tables, duplicates may exist. For example, several records in the Orders table might refer to the same customer. If this is the case, the key is called a foreign ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.