网络释义专业释义英英释义
Tuple relational calculus 元组关系演算
domain relational calculus [计] 域关系演算 ; 域关系微积分
Relational calculus and Logical operation 关系运算与逻辑运算
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关系运算 - 引用次数：3 参考来源 - 基于数据库系统的可变精度粗糙集模型 in C关系演算关连式微积分
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关系演算
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Relational calculus
- abstract: Relational calculus consists of two calculi, the tuple relational calculus and the domain relational calculus, that are part of the relational model for databases and provide a declarative way to specify database queries. This in contrast to the relational algebra which is also part of the relational model but provides a more procedural way for specifying queries.
以上来源于: WordNet
双语例句
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Our approach is based on an extended relational calculus, and reduces the consistency problem to a satisfiability problem of relational formulae.
该方法以扩展的关系逻辑为语义基础，把一致性问题归结为关系逻辑公式的可满足性问题。
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Based on this model, this paper constructs two different kinds of medium relational database query languages: medium relational calculus and medium relational algebra.
给出了中介关系数据模型，在此基础上构造了两类不同的中介关系数据库查询语言：中介关系演算和中介关系代数。
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Based on the relational knowledge model, the knowledge base management system GKBMS is introduced in this paper. GKBMS combines predicate calculus with relational calculus.
本文以关系知识模型为基础，用谓词演算和关系演算描述了一个知识库管理系统GKBMS。
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