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Type Inheritance and Relational Theory: Subtypes, Supertypes, and Substitutability

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by C. J. Date
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Type Inheritance and Relational Theory: Subtypes, Supertypes, and Substitutability by C. J. Date

Type inheritance is that phenomenon according to which we can say, for example, that every square is also a rectangle, and so properties that apply to rectangles in general apply to squares in particular. In other words, squares are a subtype of rectangles, and rectangles are a supertype of squares. Recognizing and acting upon such subtype / supertype relationships provides numerous benefits: Certainly it can help in data modeling, and it can also provide for code reuse in applications. For these reasons, many languages, including the standard database language SQL, have long supported such relationships. However, there doesn

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Ebook Details
Pages: 572
Size: 17.4 MB
Publisher: O'Reilly Media
Date published:   2016
ISBN: 9781491959947 (DRM-EPUB)
9781491959961 (DRM-PDF)

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This product is listed in the following categories:

Nonfiction > Computers > Information Storage & Retrieval
Nonfiction > Computers > Information Theory
Nonfiction > Computers > Database Management > Data Warehousing

This author has products in the following categories:

Nonfiction > Computers > Database Management
Nonfiction > Computers > Data Modeling & Design
Nonfiction > Computers > Programming
Nonfiction > Computers > Programming Languages > SQL
Nonfiction > Computers > Data Processing
Nonfiction > Computers > Database Management > Servers
Nonfiction > Computers > Information Theory
Nonfiction > Computers > Information Storage & Retrieval
Nonfiction > Computers > Database Management > Data Warehousing
Nonfiction > Computers

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