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单选题
有一个关系模式employee(name,department,phone_number),下面哪句话允许user1可以修改phone_number列的值
A
GRANT MODIFY (phone_number) ON TABLE employee TO user1
B
GRANT ALTER (phone_number) ON TABLE employee TO user1
C
GRANT UPDATE (phone_number) ON TABLE employee TO user1
D
GRANT REFERENCES (phone_number) ON TABLE employee TO user1
答案解析
正确答案：C
