MySQL 控制台基本语句

1）进入 MySQL 控制台；

[root@localhost ~]# mysql -u root -p
Enter password:

2）输入密码后可以进入，创建数据库；

MariaDB [(none)]> create database muke;

3）使用SHOW语句找出在服务器上当前存在什么数据库；

MariaDB [(none)]> SHOW DATABASES;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| jmt_b2b_design     |
| muke               |
| mysql              |
| performance_schema |
| shop               |
+--------------------+

4）选择你所创建的数据库；

MariaDB [(none)]> use muke;
Database changed

5）创建一个数据表；

MariaDB [muke]> create table mk_user(
-> id int(11) not null auto_increment,
-> `user_name` varchar(20) not null default '',
-> `nick_name` varchar(20) not null default '',
-> `password` char(32) not null default '',
-> `create_date` int(10) not null default '0',
-> `update_date` int(10) not null default '0',
-> primary key(`id`)
-> )ENGINE=InnoDB CHARSET=utf8;
Query OK, 0 rows affected (0.02 sec)

6）查看当前数据库中存在什么表；

MariaDB [muke]> show tables;
+----------------+
| Tables_in_muke |
+----------------+
| mk_user        |
+----------------+
1 row in set (0.00 sec)

7）查看当前数据表结构；

MariaDB [muke]> describe mk_user;
+-------------+-------------+------+-----+---------+----------------+
| Field       | Type        | Null | Key | Default | Extra          |
+-------------+-------------+------+-----+---------+----------------+
| id          | int(11)     | NO   | PRI | NULL    | auto_increment |
| user_name   | varchar(20) | NO   |     |         |                |
| nick_name   | varchar(20) | NO   |     |         |                |
| password    | char(32)    | NO   |     |         |                |
| create_date | int(10)     | NO   |     | 0       |                |
| update_date | int(10)     | NO   |     | 0       |                |
+-------------+-------------+------+-----+---------+----------------+
6 rows in set (0.00 sec)

8）往表里插入数据；

MariaDB [muke]> insert into mk_user values(1, 'zjc', 'vision', '3f799a3608509e9ed753b02bc9c6c7ed', '1443628800', '1443628800'),(2, 'zjc', 'vision', '3f799a3608509e9ed753b02bc9c6c7ed', '1443628800', '1443628800');
Query OK, 2 rows affected (0.02 sec)
Records: 2  Duplicates: 0  Warnings: 0

9）查询表；

MariaDB [muke]> select * from mk_user;
+----+-----------+-----------+----------------------------------+-------------+-------------+
| id | user_name | nick_name | password                         | create_date | update_date |
+----+-----------+-----------+----------------------------------+-------------+-------------+
|  1 | zjc       | vision    | 3f799a3608509e9ed753b02bc9c6c7ed |  1443628800 |  1443628800 |
|  2 | zjc       | vision    | 3f799a3608509e9ed753b02bc9c6c7ed |  1443628800 |  1443628800 |
+----+-----------+-----------+----------------------------------+-------------+-------------+
3 rows in set (0.00 sec)

10）修改表里的数据；

MariaDB [muke]> update mk_user set nick_name = 'visionz' where id = 1;
Query OK, 1 row affected (0.26 sec)
Rows matched: 1  Changed: 1  Warnings: 0

MariaDB [muke]> select * from mk_user;
+----+-----------+-----------+----------------------------------+-------------+-------------+
| id | user_name | nick_name | password                         | create_date | update_date |
+----+-----------+-----------+----------------------------------+-------------+-------------+
|  1 | zjc       | visionz   | 3f799a3608509e9ed753b02bc9c6c7ed |  1443628800 |  1443628800 |
|  2 | zjc       | vision    | 3f799a3608509e9ed753b02bc9c6c7ed |  1443628800 |  1443628800 |
+----+-----------+-----------+----------------------------------+-------------+-------------+
3 rows in set (0.00 sec)

11）删除表里的数据；

MariaDB [muke]> delete from mk_user where id=2;
Query OK, 1 row affected (0.01 sec)

MariaDB [muke]> select * from mk_user;
+----+-----------+-----------+----------------------------------+-------------+-------------+
| id | user_name | nick_name | password                         | create_date | update_date |
+----+-----------+-----------+----------------------------------+-------------+-------------+
|  1 | zjc       | visionz   | 3f799a3608509e9ed753b02bc9c6c7ed |  1443628800 |  1443628800 |
+----+-----------+-----------+----------------------------------+-------------+-------------+
2 rows in set (0.00 sec)

12）清空表数据（自增字段变为1，如果不想可用delete）；

MariaDB [muke]> truncate table mk_user;
Query OK, 0 rows affected (0.11 sec)

13）修改表结构；

MariaDB [muke]> alter table mk_user add column score int(11) not null default 0;
Query OK, 0 rows affected (0.05 sec)

14）删除表；

MariaDB [muke]> drop table mk_user;
Query OK, 0 rows affected (0.03 sec)