Division is an additional operation in relational algebra, it can be replaced by which set of the following operations equivalently?
选项:
A:Select, Project, Cartesian-Product;
B:Union, Project, Cartesian-Product;
C:Select, Rename, Cartesian-Product ;
D:Set difference, Project, Cartesian-Product
发布时间:2024-04-03 10:07:08