ARE: Constraints, anyone?

[David FOXWELL <David.FOXWELL@xxxxxxxxx>]

> -----Message d'origine-----
> [mailto:midrange-l-bounces@xxxxxxxxxxxx] De la part de Dennis Lovelady
>
> > I've just been asked to look into adding constraints to a 
> database (as 
> > an alternative to triggers on the database, and exit 
> programs on the 
> > application).
>
> Let's start with information about the types of constraints.  
> What is the business need?  There are some constraints you're 
> probably used to already (though they go by a different 
> name), such as UNIQUEness of a key.  There can be constraints 
> that ensure that data is not orphaned (such as an order 
> record without a matching customer record) and so on.  What 
> type are we talking about here?


 And when you get round to actually implementing something, many of us will like to hear what you did, how and why, etc, etc.