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。
calculus of relations 关系演算
数据库 数据库理论 释文 relational calculus 关系演算
- completely continuous mapping
- completely continuous operator
- completely controllable
- completely controllable object
- completely controllable system
- completely convex
- completely convex function
- completely convex set
- completely decomposable
- completely decomposable matrix
- completely decomposable module
- completely defined correspondence
- completely defined function
- completely distributive lattice
- completely enumerable class
- completely equivalent
- completely equivalent algorithm
- completely equivalent method
- completely ergodic automorphism
- completely faithful module
- completely filled shell
- completely harmonic space
- completely homologous mapping
- completely illiterate
- completely indecomposable group