create databases <数据库名>;
create databases school;

use <数据库名>
use school;

create table <表名>(<属性名> <字段>,(<属性名>,<字段>))
create table student(Sno varchar(20) primary key, 
                     Sname varchar(9),
                     Sage smallint(6),
                     Ssex char(4),
                     Sdept char(10));

drop table <数据名>;
drop table test;
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