Comments on: When should you use database constraints? http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html Productive software development using ASP.NET, C#, Adobe Flex, and other technologies and tools. Sat, 22 Nov 2008 02:39:57 +0000 http://wordpress.org/?v=2.6.3 By: Joyce http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html#comment-706 Joyce Wed, 01 Oct 2008 22:52:25 +0000 http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html#comment-706 How do you constrain data in a field? How do you constrain data in a field?

]]> By: links for 2008-05-20 « Tathata - d’ Observer http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html#comment-364 links for 2008-05-20 « Tathata - d’ Observer Tue, 20 May 2008 01:11:58 +0000 http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html#comment-364 [...] When should you use database constraints? (tags: database sql constraint theory) [...] [...] When should you use database constraints? (tags: database sql constraint theory) [...]

]]> By: Paul Houle http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html#comment-308 Paul Houle Thu, 15 May 2008 16:03:55 +0000 http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html#comment-308 Well, I've worked in places where people tweak the system with the SQL monitor or by connecting with Microsoft Access. In a situation like that, constraints give you some protection against incorrect manual actions. Well, I’ve worked in places where people tweak the system with the SQL monitor or by connecting with Microsoft Access. In a situation like that, constraints give you some protection against incorrect manual actions.

]]> By: Kenneth Downs http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html#comment-295 Kenneth Downs Wed, 14 May 2008 21:41:14 +0000 http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html#comment-295 You did not answer the question. I'll take a stab at it. You state that constraints in the db are the most correct, but in the application are the easiest. A good programmer would ask how to get the correct ones easily. The answer is that the application needs to be able to understand the server errors and present them to the user. I suspect you may not understand this because you state the application must "synchronize" its constraints with the server, which is not true. The application should not be bothering with constraints that will be enforced on the server, it only needs to be able to report failures to the user. You did not answer the question. I’ll take a stab at it.

You state that constraints in the db are the most correct, but in the application are the easiest. A good programmer would ask how to get the correct ones easily. The answer is that the application needs to be able to understand the server errors and present them to the user. I suspect you may not understand this because you state the application must “synchronize” its constraints with the server, which is not true. The application should not be bothering with constraints that will be enforced on the server, it only needs to be able to report failures to the user.

]]> By: Donald Organ http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html#comment-287 Donald Organ Tue, 13 May 2008 16:33:58 +0000 http://www.ytechie.com/2008/05/when-should-you-use-database-constraints.html#comment-287 ? ?

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