January 2008
Intermediate to advanced
384 pages
8h 1m
English
Content preview from Joe Celko's Thinking in Sets: Auxiliary, Temporal, and Virtual Tables in SQLBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Auxiliary, Temporal, and Virtual Tables
There is only one data structure in SQL: the table. How tables are used often affects how they are declared. There are base, or operational, tables that persist in storage. They hold the core data of the data model, but they are not the only kind of table.
Staging tables are horrible monsters without constraints or even keys. But SQL allows you to create them. You use them as staging areas for dirty, raw data that you would never ever put in your beautiful clean base tables.
Auxiliary tables are used to compute functions and other values by joins rather than by procedural programming. Common examples are look-up tables for translating encodings and functions that cannot be computed easily. They should not ...
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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.