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Type inheritance and relational theory : subtypes, supertypes, and substitutability : inheritance in The third manifesto /
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....
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Sebastopol, CA :
O'Reilly Media,
[2016]
|
| Temas: | |
| Acceso en línea: | Texto completo (Requiere registro previo con correo institucional) |
MARC
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| 100 | 1 | |a Date, C. J., |e author. | |
| 245 | 1 | 0 | |a Type inheritance and relational theory : |b subtypes, supertypes, and substitutability : inheritance in The third manifesto / |c C.J. Date. |
| 264 | 1 | |a Sebastopol, CA : |b O'Reilly Media, |c [2016] | |
| 264 | 4 | |c ©2016 | |
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| 504 | |a Includes bibliographical references and index. | ||
| 520 | |a 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't seem to be any consensus in the community at large on a formal, rigorous, and abstract model of inheritance. This book proposes such a model, one that enjoys several advantages over other approaches, not the least of which it is that it's fully compatible with the well known relational model of data. | ||
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| 650 | 0 | |a Relational databases. | |
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| 650 | 6 | |a Bases de données |x Gestion. | |
| 650 | 6 | |a Bases de données relationnelles. | |
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| 650 | 7 | |a COMPUTERS |x Desktop Applications |x Databases. |2 bisacsh | |
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| 650 | 7 | |a Relational databases. |2 fast |0 (OCoLC)fst01093575 | |
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