河北燕双鹰的帅气作业

前言

数据库名称可为【schoolDB】,字符集【utf8】,排序规则【utf8_general_ci】。

1.建表语句-----DDL

CREATE TABLE `student` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '学号',
  `createDate` datetime DEFAULT NULL COMMENT '创建时间',
  `userName` varchar(20) DEFAULT NULL COMMENT '用户名',
  `pwd` varchar(36) DEFAULT NULL COMMENT '密码',
  `phone` varchar(11) DEFAULT NULL COMMENT '手机号',
  `age` tinyint(3) DEFAULT NULL COMMENT '年龄',
  `sex` char(2) DEFAULT NULL COMMENT '性别',
  `intorduce` varchar(255) DEFAULT NULL COMMENT '简介',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8;

2.插入语句-----DML

INSERT INTO student VALUES(0,'2024-2-25 10:00:00','刘德华','123654','15612345678',62,'男','永远的男神，爱你一万年，爱你经得起考验');
INSERT INTO student VALUES(0,'2024-2-25 10:00:00','刘青云','123154','15612345678',65,'男','真正的演员，好角色用心演绎');
INSERT INTO student VALUES(0,'2024-2-25 10:00:00','周星驰','123624','15612345678',61,'男','所有的电影都没有对爱情有过轻视');
INSERT INTO student VALUES(0,'2024-2-25 10:00:00','张翰','122654','15612345678',65,'男','一起坐死在流星雨下');
INSERT INTO student VALUES(0,'2024-2-25 10:00:00','王祖贤','223654','15612345678',65,'女','你在美你能比过王祖贤吗');
INSERT INTO student (userName,age,introduce) VALUES('刘亦菲',37,'神仙姐姐');

3.基础查询语句-----DQL

select*from student;
select userName as '姓名',age 年龄 ,'性别',introduce '简介'
from student
where pwd is no null;
select distinct sex '性别类型',introduce '简介' from student ORDER BY age desc;
select*from student LIMIT 2;
select*from student LIMIT 4,2;