0615NAME IS NULL
2022/12/18(日) 16:13:04.26ID:ixe6oE+RA Relational Model of Data for Large Shared Data Banks
Relational Completeness of Data Base Sublanguages
1981 Turing Award Lecture - Relational Database: A Practical Foundation for Productivity
The Relational Model for Database Management (Version 2 ed.). Addison Wesley Publishing Company