MySQL 02 MySQL常用命令

1、登录

C:/> mysql -h 主机名 -u 用户名 -p 密码

2、显示所有数据库

mysql > show databases;

3、进入指定的数据库

use 库名
mysql > use mysql;;

4、查看库中所有表

show tables from 库名;查看其他库中的所有表
mysql > show tables;
mysql > show tables from mysql;

5、查看当前库

mysql > select database();

6、查看版本

C:/ > mysql -version      //进入mysql客户端之前
C:/ > mysql -V          //进入mysql客户端之前
mysql > select version();   //进入mysql客户端之后

7、新建一个数据库

mysql > create database spark;

8、建表

mysql > create table customer(id varchar(30),age int, name varchar(30),birthday date);

9、查看表结构

mysql > desc customer;

10、查看表

mysql > select * from customer;

11、查询特定列

mysql > select id,name,sex from student

12、查询数据并进行过滤

mysql > select id,name,sex from student where id => 1003;

13、运算符查询

mysql > select id,name,sex from student where age >=18 and age <=35;
mysql > select id,name,sex from student where age between 18 and 35;

14、查询变种

mysql > select * from student where age =18 or age =35 or age =23
mysql > select * from student where age in (18,23,35);

mysql > select * from student where name like '%小%';
mysql > select * from student where name like '_明%'; 

mysql > select * from student where email is null;
mysql > select * from student where email is not null; 

mysql > select * from student order by age;  //升序
mysql > select * from student order by age desc; //降序
尖叫提示：%匹配任意多个字符，_只匹配一个字符

15、插入数据

mysql > insert into student(id,name) values(1001, '小明');
尖叫提示：插入 varchar 或 date 型的数据要用 单引号 引起来

16、修改表

mysql > update student set name='小红' where id = 1001;

17、删除表记录

mysql > delete from student where id =1001;

18、删除表

mysql > drop table customer;
删除数据库
mysql> drop database girls；

19、退出

一共三种方式
mysql > exit;
mysql > quit;
Ctrl+C