2018年6月9日
review——database （1）CH8-Relational Database Design
摘要： 1.1NF(P328、P215) In the relationalmodel, we formalize this idea that attributes do not have anysubstructure. A domain is atomic if elements of the dom 阅读全文
posted @ 2018-06-09 17:37 perplex 阅读(158) 评论(0) 推荐(0) 编辑