May 2009
Beginner
840 pages
16h 18m
English
book
Sams Teach Yourself SQL in One Hour a Day, Fifth Edition
by Ryan Stephens, Ron Plew, Arie D. Jones
Content preview from Sams Teach Yourself SQL in One Hour a Day, Fifth Edition
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LESSON 6Embedding Subqueries into Queries
A subquery is a query whose results are passed as the argument for another query. Subqueries enable you to bind several queries together. By the end of this lesson, you will be able to do the following:
• Build a subquery.
• Use the keywords EXISTS, ANY, and ALL with your subqueries.
• Build and use correlated subqueries.
In this lesson, we will be working with the PART and ORDERS tables. To ensure that you have these tables created and that data has been inserted into them, please do the following in your MySQL database. The database bob in the following example should be substituted with the name of the database you created and into which you have been putting your tables:
Input/Output
You will need ...
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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.