DBI202Xuất hiện trong 1 đề thi
Why the intersection operator is not called a primitive relational algebra operator?
Các lựa chọn
ABecause the intersection operator can be expressed through the union operator and the difference operator
BBecause the intersection operator can be expressed through the selection operator and the projection operator
CBecause the intersection operator can be expressed through the product operator and the projection operator
DBecause the intersection operator can be expressed through the selection operator and the product operator