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1.表结构以oracle为例，下面定义三个表：学生信息表Student，课程表Course和选课表SC：create table Student ( Sno varchar2(10) primary key, Sname varchar2(20) not null, Ssex char(2) check (Ssex in('男', '女')

1. CentOS 6安装MySQLThe recommended way to install MySQL on a Linux system is via RPM. MySQL-server-5.5.28-1.el6.i686.rpm - The MySQL database server, which manages databases and tables, controls

1 Create Databasescreate database mydb DEFAULT CHARSET=utf8;2 Create Tablescreate table ids ( id int auto_increment, name varchar(10) not null, num varchar(10), descript