DBI202Xuất hiện trong 1 đề thi
Choose the correct statement.
Các lựa chọn
AProject operator shows list of the attributes we wish to appear in the result.
BSelect operator shows list of the attributes of one relation we wish to appear in the result
CUnion operator shows list of the attributes of two relations we wish to appear in the result
DRename operator shows list of the rows of one relation we wish to appear in the result