October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth EditionBecome 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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Exploring SQL's Background
To fully use the power of a relational database as described briefly on Day 1, “Getting Started with SQL,” you need to communicate with it. The ultimate communication would be to turn to your computer and say, in a clear, distinct voice, “Show me all the left-handed, brown-eyed, bean counters who have worked for this company for at least 10 years.” A few of you may already be doing so (talking to your computer, not listing bean counters). Everyone else needs a more conventional way of retrieving information from the database. You can make this vital link through SQL's middle name, “Query.”
As mentioned on Day 1, the name Query is really a misnomer in this context. A SQL query is not necessarily a question to the database. ...
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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.