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Oracle Application Express 3.2 - The Essentials and More

You're reading from   Oracle Application Express 3.2 - The Essentials and More Develop Native Oracle database-centric web applications quickly and easily with Oracle APEX

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Product type Paperback
Published in Jun 2010
Publisher Packt
ISBN-13 9781847194527
Length 644 pages
Edition 1st Edition
Languages
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Table of Contents (30) Chapters Close

Oracle Application Express 3.2
Credits
About the Authors
About the Reviewers
1. Preface
1. An Introduction to APEX FREE CHAPTER 2. What we need to know to effectively use APEX 3. APEX Basic Concepts 4. The Application Builder Basic Concepts and Building Blocks 5. APEX Items 6. APEX Buttons 7. APEX Computations 8. APEX Validations 9. APEX Processes 10. APEX Branches 11. APEX SQL Workshop 12. APEX Forms 13. APEX Reports 14. Tabular Forms 15. Calendars 16. Interactive Reports 17. AJAX with APEX 18. Globalization and Localization With APEX Applications 19. Right-To-Left Support in APEX 20. Deploying APEX Applications 21. The APEX Runtime Environment 22. Security 23. Application Conversion 24. APEX Best Practices APEX Installation, Upgrade, and Configuration Tips

Creating a new validation


On the Page Definition page, press the Create icon of the Validations section. This will load the Create Validation wizard:

Validation level

In the first screen of the wizard we can choose the validation level we want to define:

  • Item level validation: At this level, we define a validation for a specific item on the page.

  • Page level validation: At this level, we can define a validation that is not tied to a specific item on the page (e.g. validation on a tabular form column).

Create multiple not null validations

A Not Null validation is probably the most common validation in use. At the bottom of the first wizard screen, as can be seen in the previous screenshot, there's a link to a page wizard. It allows us to quickly define a Not Null validation for every item on the page that we pick.

For every checked item, the wizard will create a Not Null validation with a generic error message of Value must be specified.

Note

The Create Form wizard automatically creates a Not Null...

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