By Kowalski R.

An set of rules could be considered as along with a good judgment part, which specifies the information for use in fixing difficulties, and a keep an eye on part, which determines the problem-solving options via which that wisdom is used. The good judgment part determines the which means of the set of rules while the keep an eye on part simply impacts its potency. The potency of an set of rules can frequently be more desirable via enhancing the keep watch over part with no altering the good judgment of the set of rules. We argue that laptop courses will be extra usually right and extra simply more desirable and converted if their common sense and keep an eye on facets have been pointed out and separated within the software textual content. keywords and words: keep an eye on language. good judgment programming, nonprocedural language, programming method, software specification, relational facts constructions

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It makes little sense to test a data-dependent application without validating the data pieces that drive the application components! This chapter serves as a brief introduction to the world of software testing and how testing techniques can be applied in database development scenarios. Software testing is a huge field, complete with much of its own lingo, so the stress here is on those areas I’ve found to be most important for database developers. Keep in mind that some of this material may not apply to more broadly focused testing scenarios.

As noted before, you might be tempted to refactor common unit test code into a data access library, but be careful lest you end up testing your test framework instead of the actual routine you’re attempting to test. Many hours can be wasted debugging working code trying to figure out why the unit test is failing, when it’s actually the fault of some code the unit test is relying on to do its job. Unit tests allow for quick, automated verification of interfaces. In essence, they help you as a developer to guarantee that in making changes to a system you didn’t break anything obvious.

ARE SERVERS REALLY A COMMODITY? The term commodity hardware refers to cheap, easily replaceable hardware based on standard components that are easily procured from a variety of manufacturers or distributors. This is in stark contrast to the kind of specialty hardware lock-in typical of large mainframe installations. From a maintenance and deployment point of view, this architecture has turned out to be a lot cheaper than client/server. Rather than deploying an application (not to mention its corresponding DLLs) to every machine in an enterprise, only a single deployment is necessary, to each of one or more web servers.

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