DBI202Xuất hiện trong 1 đề thi
For the following relation: Student ID | Name | City | Gender SE1234 | Le Hong Phong | HCM | Male SE1235 | Le Hong Hanh | HCM | Female SE1236 | Tran Binh Trong | HN | Male Use Algebraic query language to list all name and city of students in HCM and Male?
Các lựa chọn
AπName,City(σCity='HCM' AND Gender='Male' (Student))
BπName,City(σCity='HCM' AND Gender='Male' (Student))
CσName,City(σCity='HCM' && Gender='Male' (Student))
DσName,City(σCity='HCM' && Gender='Male' (Student))