- relation calculus
- tuple relational calculus
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关系演算的英文
例句与用法
- 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。