- relational operand
- SAP.тех. операнд сравнения
Универсальный англо-русский словарь. Академик.ру. 2011.
relational operand
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Relational algebra — Not to be confused with Relation algebra. Relational algebra, an offshoot of first order logic (and of algebra of sets), deals with a set of finitary relations (see also relation (database)) that is closed under certain operators. These operators … Wikipedia
Relational model — The relational model for database management is a database model based on first order predicate logic, first formulated and proposed in 1969 by Edgar Codd. [ Derivability, Redundancy, and Consistency of Relations Stored in Large Data Banks , E.F … Wikipedia
Projection (relational algebra) — IntroductionIn relational algebra, a projection is a unary operation written as pi {a 1, ...,a n}( R ) where a 1,...,a n is a set of attribute names. The result of such projection is defined as the set obtained when the components of the tuple R… … Wikipedia
Rename (relational algebra) — In relational algebra, a rename is a unary operation written as ho {a/b}(R) where:* a and b are attribute names * R is a relationThe result is identical to R except that the b field in all tuples is renamed to an a field. For an example, consider … Wikipedia
Operators in C and C++ — This is a list of operators in the C and C++ programming languages. All the operators listed exist in C++; the fourth column Included in C , dictates whether an operator is also present in C. Note that C does not support operator overloading.… … Wikipedia
Join (SQL) — An SQL join clause combines records from two or more tables in a database.[1] It creates a set that can be saved as a table or used as is. A JOIN is a means for combining fields from two tables by using values common to each. ANSI standard SQL… … Wikipedia
Common operator notation — This article is about the concept of operator precedence. For operator precedence parsing, see operator precedence parser. In programming languages, common operator notation is one way of notating mathematical expressions as a linear sequence of… … Wikipedia
Relationale Algebra — In der Theorie der Datenbanken versteht man unter einer Relationenalgebra oder einer Relationalen Algebra eine formale Sprache, mit der sich Abfragen über einem relationalen Schema formulieren lassen. Sie erlaubt es, Relationen miteinander zu… … Deutsch Wikipedia
Assignment (computer science) — In computer programming, an assignment statement sets or re sets the value stored in the storage location(s) denoted by a variable name. In most imperative computer programming languages, assignment statements are one of the basic statements.… … Wikipedia
Tandem Computers — A Tandem Computers promotional mug Tandem Computers, Inc. was the dominant manufacturer of fault tolerant computer systems for ATM networks, banks, stock exchanges, telephone switching centers, and other similar commercial transaction processing… … Wikipedia
Mengenoperationen — In der Theorie der Datenbanken versteht man unter einer Relationenalgebra oder einer Relationalen Algebra eine formale Sprache, mit der sich Anfragen über einem relationalen Schema formulieren lassen. Sie erlaubt es, Relationen miteinander zu… … Deutsch Wikipedia
