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relational algebra

美 /rɪˈleɪʃənl ˈældʒɪbrə/
  • 关系代数：一种使用代数结构对数据进行建模并定义查询的理论，具有良好的语义基础。

双语例句

  1. The lookup is an example of the Rails 3 relational algebra.
    查询是 Rails 3 关系代数的一个示例。
  2. Rails 3 incorporates relational algebra, a DSL designed to express queries.
    Rails 3 合并了 relational algebra，这是专门设计用于表示查询的 DSL。
  3. The derived relational algebra operators are widely used in the relational database query languages.
    关系代数的派生算子在关系数据库查询语言中得到了广泛应用。

网络短语

  • temporal relational algebra
    时态关系代数
  • relational algebra expression
    关系代数表达式；算式
  • Vague relational algebra
    Vague关系代数
  • relational algebra command interface
    关系代数命令接口
  • The Relational Algebra
    关联代数运算

英英释义

  • In computer science, relational algebra is an offshoot of first-order logic and of algebra of sets concerned with operations over finitary relations, usually made more convenient to work with by identifying the components of a tuple by a name (called attribute) rather than by a numeric column index, which is called a relation in database terminology.