DBI202Xuất hiện trong 1 đề thi
Which of the following SQL statement returns the number of Service Tickets placed by each customer?
Các lựa chọn
ASELECT custID FROM ServiceTicket GROUP BY COUNT(*);
BSELECT custID, COUNT(*) FROM ServiceTicket;
CSELECT custID, COUNT(*) FROM ServiceTicket GROUP BY custID;
DSELECT COUNT(custID) FROM ServiceTicket GROUP BY serviceTicketID;