DBI202Xuất hiện trong 1 đề thi
For the following relations and a Set operation: \nEmployee\nName | City | Gender\nNguyen Trung Truc | HCM | Male\nLe Hong Son | HCM | Male \nCustomer\nName | City | Gender\nNguyen Trung Truc | HCM | Male\nTran Tuyet Nhi | HN | Female \nand \nEmployee ∪ Customer \nWhat is the result of the Union operation?
Các lựa chọn
AName | City | Gender\nNguyen Trung Truc | HCM | Male\nLe Hong Son | HCM | Male
BName | City | Gender\nNguyen Trung Truc | HCM | Male\nTran Tuyet Nhi | HN | Female
CName | City | Gender\nNguyen Trung Truc | HCM | Male\nLe Hong Son | HCM | Male\nNguyen Trung Truc | HCM | Male\nTran Tuyet Nhi | HN | Female
DName | City | Gender\nNguyen Trung Truc | HCM | Male\nLe Hong Son | HCM | Male\nTran Tuyet Nhi | HN | Female