February 2015
Beginner to intermediate
576 pages
16h 15m
English
Content preview from Big Data Analytics
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110 • Big Data Analytics
Hierarchical Database
In your organization, there is probably an organization chart. Workers
answer to managers. Managers answer to directors. Going up the chain,
we pass through vice presidents, presidents, and the C suite. In a typical
organization, a manager has many subordinates, but each subordinate has
only one manager.
e hierarchical database, when diagrammed, resembles this organi-
zational chart. ere are parent/child relationships in which each parent
record may have multiple children, but each child record has only a single
parent. Having just discussed the ineciencies of one-to-many relation-
ships, it is eas ...
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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.