June 2017
Beginner
428 pages
10h 2m
English
Content preview from Practical GIS
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Relational databases
The first and oldest database types are relational databases. They hold data in a well-structured form in tables. Tables consist of rows and columns. A column represents a single attribute of the data, which is stored as a specific data type. Rows represent a single data record, such as a customer's contact details, or a vector feature. Relational databases are very often databases (I could only name MySQL versions released before 2010 which are not transactional). The philosophy behind transactional databases can be expressed with the anagram ACID (Atomicity, Consistency, Isolation, Durability). These are the four very important properties that relational databases offer. These properties can be explained as follows: ...
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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.