You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?()

A . ALTER TABLE students ADD PRIMARY KEY _ id; B . ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id); C . ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id; D . ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id); E . ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id)

时间:2022-11-10 21:05:07 所属题库:IBM(000-118)题库

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