October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth Edition
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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.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.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.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.
Workshop
The Workshop provides quiz questions to help solidify your understanding of the material covered, as well as exercises to provide you with experience in using what you have learned. Try to answer the quiz and exercise questions before checking the answers in Appendix A, “Answers.”
Quiz
| 1: | What does it mean to streamline a SQL statement? |
| 2: | Should tables and their corresponding indexes reside on the same disk? |
| 3: | Why is the arrangement of conditions in a SQL statement important? |
| 4: | What happens during a full-table scan? |
| 5: | How can you avoid a full-table scan? |
| 6: | What are some common hindrances of general performance? |
Exercises
| 1: | Make the following SQL statement more readable:
SELECT EMPLOYEE.LAST_NAME, EMPLOYEE.FIRST_NAME, EMPLOYEE.MIDDLE_NAME, ... |
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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.