Cleveland
发表于 2025-3-21 17:46:55
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假装是我
发表于 2025-3-21 21:57:24
Tuple, Table, and Database Predicatestabase predicates to describe the data integrity constraints of a database design. The goal of this chapter is to establish these three different classes of predicates—which jointly we’ll refer to as .—and to give ample examples of predicates within each class.
Sad570
发表于 2025-3-22 01:34:39
Entscheidungsverfahren für komplexe ProblemeThe word “logic” has many meanings, and is heavily overloaded. It’s derived from the Greek word ., meaning “concerning language and speech” or “human reasoning.”
修饰语
发表于 2025-3-22 06:38:21
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Adornment
发表于 2025-3-22 09:50:23
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高原
发表于 2025-3-22 14:50:15
Entscheidungsverfahren für komplexe ProblemeFrom this chapter onward we’ll assume that you’re thoroughly familiar with all terminology introduced in Part 1 of this book. Only if we deem it necessary will we make explicit references back to where specific terminology was first introduced and defined.
Pandemic
发表于 2025-3-22 20:59:45
Entscheidungsverhalten als rekursiver ProzeßIn this chapter, we’ll give a demonstration of how you can formally specify a database design. Formalizing a database design specification has the advantage of avoiding any ambiguity in the documentation of not only the database structure but, even more importantly, of all involved data integrity constraints.
Accord
发表于 2025-3-22 22:45:46
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免费
发表于 2025-3-23 01:53:57
https://doi.org/10.1007/978-3-322-81601-6By means of a ., you retrieve data from a database. In this chapter we’ll demonstrate how you can specify a query in a formal way. To do so, we won’t require the formal introduction of any new concepts; we’ve already presented all ingredients for specifying queries.
Badger
发表于 2025-3-23 09:18:14
Physica-Schriften zur BetriebswirtschaftThus far this book’s main focus has been on formally specifying a database design. Of course, you want to do more than just specify a database design; you usually would like to . it using some DBMS. In this chapter we turn our attention towards implementing a database design.