myriad
发表于 2025-3-28 15:36:40
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越自我
发表于 2025-3-28 19:25:17
https://doi.org/10.1007/978-90-481-8620-4er, it turns out that this belief was incorrect—that is, it turns out that several other normal forms can be defined, all of them both weaker than 5NF and stronger than fourth normal form (4NF), and all of them just as effective as 5NF at eliminating redundancy. The normal forms in question are:
现代
发表于 2025-3-28 23:37:18
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才能
发表于 2025-3-29 04:53:29
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pessimism
发表于 2025-3-29 08:36:58
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可忽略
发表于 2025-3-29 14:37:52
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Pepsin
发表于 2025-3-29 16:24:24
FDs and BCNF (Informal)us explanations and associated definitions are all intentionally a little informal at this stage. (Informal, but not inaccurate; I won’t tell any deliberate lies.) A more formal treatment of the material appears in the next chapter.
Lyme-disease
发表于 2025-3-29 21:11:43
Book 2019Latest editioncrucial notion of data consistency.Sequencing of topics has been improved, and many explanations and examples have been rewritten and clarified based upon the author’s teaching of the content in instructor-led courses. .This book aims to be different from other books on design by bridging the gap be
Conducive
发表于 2025-3-30 01:06:49
ations and examples have been rewritten and clarified based upon the author’s teaching of the content in instructor-led courses. .This book aims to be different from other books on design by bridging the gap be978-1-4842-5539-1978-1-4842-5540-7
政府
发表于 2025-3-30 04:21:52
Preliminariesthat is—and everybody knows that normal forms are a major component of that theory; hence the first part of the subtitle. But there’s more to that theory than just normal forms, and that fact accounts for that subtitle’s second part. Third, it’s unfortunately the case that—from the practitioner’s po