MySQL单表查询实例详解

1、准备数据 以下操作将在该表中进行 create table student ( id int unsigned primary key auto_increment, name char(12) not null, gender enum("male","famale") default "male", age tinyint unsigned not null, hoc_group char(12) not null, html tinyint unsigned not null, css tinyint unsigned not null, js tinyint un