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- In relational algebra, a rename is a unary operation written as where:
* R is a relation
* a and b are attribute names
* b is an attribute of R The result is identical to R except that the b attribute in all tuples is renamed to a. For an example, consider the following invocation of ρ on an Employee relation and the result of that invocation: Formally, the semantics of the rename operator is defined as follows: where is defined as the tuple t, with the b attribute renamed to a, so that: (en)
- Na álgebra relacional, o operador de renomeação é utilizado para alterar o nome das colunas de uma tabela. Utilizado para relacionamentos onde possam surgir nomes iguais para as colunas, como num relacionamento da tabela com ela mesma. (pt)
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- 2145 (xsd:nonNegativeInteger)
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| rdfs:comment
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- In relational algebra, a rename is a unary operation written as where:
* R is a relation
* a and b are attribute names
* b is an attribute of R The result is identical to R except that the b attribute in all tuples is renamed to a. For an example, consider the following invocation of ρ on an Employee relation and the result of that invocation: Formally, the semantics of the rename operator is defined as follows: where is defined as the tuple t, with the b attribute renamed to a, so that: (en)
- Na álgebra relacional, o operador de renomeação é utilizado para alterar o nome das colunas de uma tabela. Utilizado para relacionamentos onde possam surgir nomes iguais para as colunas, como num relacionamento da tabela com ela mesma. (pt)
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- Rename (relational algebra) (en)
- Renomear (álgebra relacional) (pt)
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