February 2012
Intermediate to advanced
832 pages
23h 14m
English
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Chapter 5. Customizing Data Validation
Data validation is one of the most significant responsibilities of line-of-business applications. In fact, an application that accepts input from users needs to validate data before sending it to the back-end database. Think of fields that only accept numeric values: They need to validate the user input to ensure that no alphabetic characters are entered, and then the application must notify the user of validation errors. Modern relational databases usually provide built-in validation rules, such as constraints, null values, or default values. Database validation is important, but in modern data-centric applications ...
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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.