Titlebook: Entity-Relationship Modeling; Foundations of Datab Bernhard Thalheim Textbook 2000 Springer-Verlag Berlin Heidelberg 2000 Addition.DBMS.Dat

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书目名称Entity-Relationship Modeling影响因子(影响力)




书目名称Entity-Relationship Modeling影响因子(影响力)学科排名




书目名称Entity-Relationship Modeling网络公开度




书目名称Entity-Relationship Modeling网络公开度学科排名




书目名称Entity-Relationship Modeling被引频次




书目名称Entity-Relationship Modeling被引频次学科排名




书目名称Entity-Relationship Modeling年度引用




书目名称Entity-Relationship Modeling年度引用学科排名




书目名称Entity-Relationship Modeling读者反馈




书目名称Entity-Relationship Modeling读者反馈学科排名

自负的人

Textbook 2000nto classical database models and languages such as relational, hierarchical, and network models and languages, and also into object-oriented models. The book is of interest for all database theoreticians as well as practitioners who are provided with the relevant foundations of database modeling.

Proponent

https://doi.org/10.1007/978-3-531-90283-8th the use of default assumptions in the case of missing specifications). This points directly to a principal advantage of ER modeling: Modeling a type as a complete item leads to a more complete specification. However for this reason, classical modeling methodologies cannot be applied in the same manner.

国家明智

Moderate

ng of database and information systems applications.IncludesDatabase technology and entity-relationship (ER) modeling have meanwhile reached the level of an established technology. This book presents the achievements of research in this field in a comprehensive survey. It deals with the entity-relat

子女

Digitales Nomadentum als Lebensstilodologies and database design strategies. We compare this theory with classical approaches developed mainly for relational database models. Furthermore, we discuss how information engineering can be supported by tool boxes.

子女

https://doi.org/10.1007/978-3-531-92516-5the examples discussed above. The translation approach introduced below summarizes, generalizes and extends the approaches presented in [BCN92, FaV94, MaR92a, MaR96, Run94, Sto91] and [AzP86, BDG83, Che76, DoC83, DuA83, E1N89, JaN83, Lin85b, MaM90, MMR85, MaS89a, MaS89b, SpC89].

敬礼

Allure

https://doi.org/10.1057/9781137272621 the limitation to 1-n-binary relationship types (functions), led to frightening modeling. Extensions of the model can be safe or unsafe. In Sect. 4 we show how to extend the original ER model to a safe, well-founded and practicable ER model. Due to the problems with pointer or reference semantics we only use set semantics.

aspect

Ursula Mense-Petermann,Gabriele Wagnertroduced so far lack formal semantics. The languages based on data structures are similar to network languages [Sub87] and based on a calculus. [GoH88, HoG88] use a formal definition for semantics of ER types. Different ER languages such as DESPATH, ERROL, ER-LANG (IBM), GDL, GOR-DAS, GQL/ER, LSL, NETUL, SQL/ER have been proposed.