ubuntu安装和使用mysql

• 安装

安装mysql：$ sudo apt-get install -y mysql-server

• 启动

启动mysql: sudo service mysql start
关闭mysql:sudo service mysql stop
重启mysql: sudo service mysql restart

• 使用

进入mysql: mysql -u 用户名 -p
然后会要求输入密码，则输入用户名对应的密码即可进入mysql

创建数据库：create database student_db;
删除数据库：drop database student_db;

进入数据库：use database_name;

创建表： create table table_name (字段参数); or create table if not exists table_name (字段参数);
删除表：drop table table_name; or drop table if exists table_name;

查看表结构：desc table_name;
or show columns from table_name;
or describe table_name;

查看表数据：select * from table_name;
查看n到m行：select * from table_name limit n-1,m

插入数据：insert into table_name(col1, col2) value(v1,v2);
修改数据：update table_name set col1=v1 where 表达式

退出当前数据库：quit;
退出mysql: quit;

ubuntu@VM-0-12-ubuntu:~$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.7.26-0ubuntu0.16.04.1 (Ubuntu)

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| school_db          |
| sys                |
+--------------------+
5 rows in set (0.00 sec)

mysql>use temp_db;
mysql>CREATE TABLE Persons (
    ->     PersonID int,
    ->     LastName varchar(255),
    ->     FirstName varchar(255),
    ->     Address varchar(255),
    ->     City varchar(255)
    -> );
Query OK, 0 rows affected (0.04 sec)

mysql> show tables;
+-------------------+
| Tables_in_temp_db |
+-------------------+
| Persons           |
+-------------------+
1 row in set (0.00 sec)

mysql>