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relational calculus中文是什么意思

  • 关系演算

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  • First , in this paper , a paraconsistent relational data model and its algebraic operators are introduced briefly . then , paraconsistent relational calculus based on this model is discussed and domain relational calculus for paraconsistent database is presented
    本文首先简要介绍了次协调关系数据模型及其代数运算,并在此基础上进一步讨论了次协调关系演算,提出了次协调关系上的域关系演算。
  • 百科解释
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.
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Last modified time:Tue, 19 Aug 2025 00:29:56 GMT

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