更新student数据表中address列的数据类型中字节长度为varchar(50)


更新student数据表中address列的数据类型中字节长度为varchar(50)

A.alter table student drop column address

B.alter table student alter address varchar(50)

C.drop column address from student

D.delete address from student

正确答案:alter table student alter address varchar(50)


Tag:SqlServer数据库原理与应用 字节 数据类型 时间:2023-12-26 10:57:35