J.V.: `Human Performance in Relational Algebra, Tuple Calculus and Domain Calculus', Int - Hansen, Hansen - 1988 () Citation Context ...ify complex queries. Practical experiments with novice and experienced users show that essential and powerful concepts of SQL, such as nested queries or set...
网络元组关系演算;关联微积演算;关联微积分 网络释义
Thus sid is the key for Suppliers, pid is the key for Parts, and sid and pid together form the key for Catalog. The Catalog relation lists the prices charged for parts by Suppliers. Write the following queries in relational algebra, tuple relational calculus, domain relational calculus and ...
Tuple Relational CalculusRelational Calculusdoi:10.1007/978-0-387-39940-9_3894Hans HinterbergerJosep Domingo-FerrerVipul KashyapVijay KhatriRichard T. SnodgrassPaolo TerenzianiManolis KoubarakisYue ZhangJames B. D. JoshiJohann Gamper
tuple calculus (database) A form ofrelational calculusin which a variable's only permitted values are tuples of a givenrelation. Codd's unimplemented languageALPHAand the subsequentQUELare examples of the tuple calculus. This article is provided by FOLDOC - Free Online Dictionary of Computing (fo...
Tuple relational calculusSummary: A paraconsistent database is one in which information may be incomplete and/or inconsistent. A data model that does not attempt to eliminate such incompleteness or inconsistency, but rather is capable of functioning in their presence, has recently been developed. In...
Tuple relational calculusA paraconsistent database is one in which information may be incomplete and/or inconsistent. A data model that does not attempt to eliminate such incompleteness or inconsistency, but rather is capable of functioning in their presence, has recently been developed. ...
Revisiting the Definition of the Relational Tuple CalculusThe tuple relational calculus has been based on the classical predicate logics. Databases are however not exactly representable in this calculus. They are finite. This finiteness results in a......
2) domain calculus language 域演算式语言3) predicate calculus language 谓词演算语言4) metalinguistic formula 元语言公式5) temporal tuple calculus 时态元组演算 1. In this paper,the author discusses the feasibilty of expressing temporal relations in nested relations and temporal tuple calculus in...