October 2002
Intermediate to advanced
688 pages
14h 14m
English
Content preview from Oracle® PL/SQL® Interactive Workbook, Second Edition
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Chapter 17 Test Your Thinking
In this chapter you learned about triggers. Here are some projects that will help you test the depth of your understanding:
| 1) | Create the following trigger: Create or modify a trigger on the ENROLLMENT table that fires before an INSERT statement. Make sure all columns that have NOT NULL and foreign key constraints defined on them are populated with their proper values. |
| 2) | Create the following trigger: Create or modify a trigger on the SECTION table that fires before an UPDATE statement. Make sure that the trigger validates incoming values so that there are no constraint violation errors. |
The projects in this section are meant to have you utilize all of the skills that you have acquired throughout this chapter. The ...
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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.