July 2005
Intermediate to advanced
1032 pages
27h 10m
English
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Internal and External Forms
Before going much further, it is important to understand the difference between the external form of a value and the internal form.
The external form of a data type defines how the user enters a value and how a value is displayed to the user. For example, if you enter a numeric value, you might enter the characters 7218942. If you enter these characters from a client that uses an ASCII encoding, you have entered the character values 37, 32, 31, 38, 39, 34, and 32 (in hexadecimal notation). The external form of a data type is used to interact with the user.
The internal form of a data type defines how a value is represented inside the database. The preceding numeric value form might be translated from the string 7218942 ...
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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.