题目:向student表中添加某一列address的命令是()
A.alter table student add address varchar(50)
B.add address varchar(50)
C.insert into address varchar(50)
D.insert into student address varchar(50)
题目:向student表中添加某一列address的命令是()
A.alter table student add address varchar(50)
B.add address varchar(50)
C.insert into address varchar(50)
D.insert into student address varchar(50)