When you were six years old, you had 20 teeth. These are called milk-teeth. After you are
查看答案
创建人表时,“身份证号”使用INTEGER数据类型,并且要求此列值不能为空、值惟一,姓名列不能为空。请在下列用于创建表人的SQL语句空缺处填入正确的内容。
CREATE TABLE 人 (身份证号 INTEGER,
姓名CHAR(20) (1) ,
性别CHAR(1),
年龄INTEGER,
地址CHAR(20),
(2) )
We have received your offer Oil June 20th,2009. We regret that we cannot accept it because