“relational calculus”的概念、定义、翻译、参考文献-科学参考

单词	relational calculus
释义	relational calculus Encyclopedia 理学数据库系统释 relational calculus关系演算一种抽象的关系数据语言，它通过数理逻辑中的谓词演算表达查询的要求。 Computer 数据库数据库理论释文 relational calculus关系演算
随便看	extension condition extension field extension filter extension frequency extension header extension ideal extension in phase extension integral domain extension module extension monad extension of a connection extension of a differential field extension of a division ring extension of a domain extension of a field extension of a function extension of a group extension of a Lie algebra extension of a mapping extension of a measure extension of a module extension of an associative algebra extension of an equation extension of an ideal extension of an operator

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。