摘要
本文定义了区间约束的非基本代数操作的语法和语义，用基本代数读作表达了非基本代数读作，
This paper defines the syntax and semantics of the non basic algebraic operations suject to interval constraint, and then expresses the non basic algebraic operations in terms of the basic algebraic operations, as is proved in this paper.
出处
《现代计算机》
2000年第97期21-23,共3页
Modern Computer
关键词
区间约束
非基本代数操作
关系数据库
Interval constraint
non basic algebraic operation
syntax and semantics
