参照以下信息选择能够正确创建orderinfo表的语句



A.        create table orderinfo(
orderid char(6) not null unique primary key,
price decimal not null,
amount int not null
);


B.        create table orderinfo(
orderid varchar(6) not null unique primary key,
price float not null,
amount int not null
);


C.        create orderinfo(
orderid varchar(6) not null unique primary key,
price float not null,
amount int not null
);


D.        create orderinfo(
orderid char(6) not null unique primary key,
price float not null,
amount int not null
);

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