17.哪個陳述式會刪除未輸入員工電話號碼的資料列?
(A)DELETEFROMEmployeeWHERE Phone IS NULL
(B)DELETEFROMEmployeeWHEREPhone=NULLABLE
(C)DELETEFROMEmployeeWHEREPhone='&'
(D)DELETEFROMEmployeeWHEREPhone IS NOTNULL

答案：登入後查看
統計： A(217), B(16), C(5), D(12), E(0) #2262043