January 2018
Intermediate to advanced
446 pages
12h 57m
English
Content preview from MySQL 8 Cookbook
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How to do it...
- If you want to store an employee number, for which the maximum possible value is 500,000, the optimum datatype is MEDIUMINT UNSIGNED (which occupies 3 bytes). If you are storing it as INT, which occupies 4 bytes, you are wasting a byte for each row.
- If you want to store the first name, for which the length is varying and the maximum possible value is 20, it is optimal to declare it as varchar(20). If you are storing it as char(20), and just a few names are 20 characters long while the remaining are less than 10 characters long, you are wasting space of 10 characters.
- While declaring varchar columns, you should consider the length. Though varchar is optimized on-disk, while loading into memory, it occupies the full length. ...
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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.