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Prohibiting overlapping constraints is the best approximation we can get to what we would really like to do Second, orthogonality complements normalization, in a sense: Normalization is about reducing redundancy within a given relvar; orthogonality is about reducing redundancy across distinct relvars We might therefore consider trying to unify them into some kind of grand redundancy reduction principle but I won t attempt any such unification in the present chapter (at least, not formally) Next, orthogonality implies that if we want to decompose some relvar via restriction instead of projection, we should take care to ensure that the restrictions in question are pairwise disjoint (as well as ensuring that their union gets us back to the original relvar, of course).

We will now cover how people have deployed Windows Forms applications in the past. We ll discuss only two relevant approaches here, even though others exist, simply because the others are either variations or combinations of these two. The two methods we will discuss are MSI deployment and NTD. We ll start with MSI.

Note: In An Introduction to Database Systems, I referred to a decomposition that satisfies this requirement as an orthogonal decomposition but I now think it would be better to generalize this term and use it to mean any decomposition that satisfies The Principle of Orthogonal Design This revised definition includes the earlier one as a special case..

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My outsourcing experience has been quite positive. Apparently I am an aberration, according to the many people who talk about how bad it is to outsource. What I find funny is when someone considers outsourcing to mean that a particular role or function is sent overseas, and doesn t understand that hiring a contractor to come onsite is the same thing. If you are hiring someone to help you with some defined tasks, does it really matter where they sit Why are you comfortable if they sit next to you and do part of your job, and not as comfortable if they are not near you One of the biggest benefits that outsourcing has for me is to make me focus on defining our current processes very helpful when someone demands to see that you have something documented even though they (1) don t really care and (2) don t understand it anyway. Having your stuff documented is necessary anyway. Plus, if your support breaks down, you can go back to your documents and make certain they are clear enough for everyone to understand. If they are, then it allows you to review the process and try making it simpler. In the end, you ll have a stabler environment, and one that is easier to maintain. And one that allows for you to keep your customers happy. Trust me, they like to be happy.

Second, good database design discipline generally requires tables to be, not just in 1NF, but also in some higher normal form (usually fifth normal form, 5NF2) However, 1NF differs from those higher normal forms in that it is mandated by the relational model; that is, relational operators such as join require their operands to be normalized, meaning they must be in at least 1NF And while the database will be generally easier to manage and deal with if the tables are in some higher normal form, the relational model as such doesn t care it just requires the tables to be in at least 1NF, and join and the other operators will then work as expected For this reason, I ll have little to say in what follows regarding those higher normal forms.

For the record, however, let me at least spell the point out explicitly that a table that s in a given normal form (say 5NF) is necessarily and by definition in all lower normal forms as well, including 1NF in particular Third, I d like to stress the point that, technically speaking, the term normalized and the term first normal form mean exactly the same thing; that is, all 1NF tables are normalized, and all normalized tables are in 1NF Thus, while it s common informally to use the term normalized to mean some higher level of normalization (perhaps 5NF), such usage is sloppy and strictly speaking incorrect Fourth, you might be a little surprised at the length of this chapter.

In the early 90s, Microsoft saw that organizations were building custom solutions to deploy their thick client applications, so it surveyed a score of clients about what problems they faced with deployment and what they would like to see in an installer solution. With that information in hand, Microsoft built and then released MSI in 1999.3 MSI is an operating system component that uses a well-defined standard to describe a deployment. Table 6-2 outlines the benefits and shortfalls of an MSI solution. Table 6-2. Advantages and Disadvantages of Using an MSI Solution

After all, isn t 1NF a pretty simple thing Well, yes, it is; but it turns out that there s rather more to say about it than you might think Certainly I believe it s important, given the fundamental importance of the subject matter, not to skimp on any of the examples, definitions, or discussions..

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