mysql安装
MYSQL下载
https://www.mysql.com/downloads/
->mysql community
->mysql community server download ->mysql community server 5.7
Mysql安装文档2019.05.06
1、 运行G:\工作\mysql5.7.26\mysql-5.7.26-winx64.msi,如果文件是ZIP则直接解压到安装目录
2、 .配置环境变量（目的是为了避免在CMD窗口下操作时反复切换路径）在Path下添加C:\Program Files\MySQL\MySQL Server 5.7\bin
3.编写配置文件
我们发现解压后的目录并没有my.ini（或my-default.ini）文件，没关系可以自行创建。在安装根目录下添加 my.ini，比如我这里是：C:\Program Files\MySQL\MySQL Server 5.7\\my-default.ini，写入基本配置：
[mysqld]
# 设置3306端口
port=3306
# 设置mysql的安装目录
basedir=C:\Program Files\MySQL\MySQL Server 5.7\
# 设置mysql数据库的数据的存放目录
datadir=C:\Program Files\MySQL\MySQL Server 5.7\data
# 允许最大连接数
max_connections=200
# 允许连接失败的次数。这是为了防止有人从该主机试图攻击数据库系统
max_connect_errors=10
# 服务端使用的字符集默认为UTF8
character-set-server=utf8
# 创建新表时将使用的默认存储引擎
default-storage-engine=INNODB
# 默认使用“mysql_native_password”插件认证
default_authentication_plugin=mysql_native_password
[mysql]
# 设置mysql客户端默认字符集
default-character-set=utf8
[client]
# 设置mysql客户端连接服务端时默认使用的端口
port=3306
default-character-set=utf8
4、MYSQL 执行安装
C:\Program Files\MySQL\MySQL Server 5.7\bin>mysqld install
Service successfully installed.
5、MYSQL初始化
C:\Program Files\MySQL\MySQL Server 5.7\bin>mysqld --initialize --console
2019-05-07T01:03:58.089955Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2019-05-07T01:03:59.425915Z 0 [Warning] InnoDB: New log files created, LSN=45790
2019-05-07T01:03:59.858905Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2019-05-07T01:04:00.012429Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: ff60d9a5-7063-11e9-93dc-7427eac27e63.
2019-05-07T01:04:00.067655Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2019-05-07T01:04:00.232744Z 1 [Note] A temporary password is generated for root@localhost: g/)pkWZzM32N
C:\Program Files\MySQL\MySQL Server 5.7\bin>
6、MYSQL 启动服务
C:\Program Files\MySQL\MySQL Server 5.7\bin>net start mysql
MySQL 服务正在启动 .
MySQL 服务已经启动成功。
7、修改初始化密码：
C:\Program Files\MySQL\MySQL Server 5.7\bin>mysql -u root -p
Enter password: ************
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.26
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> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';
8、利用初始化密码登录
C:\Program Files\MySQL\MySQL Server 5.7\bin>mysql -u root -p
Enter password: ****
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.7.26 MySQL Community Server (GPL)
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>
修改Mysql 数据库默认密码方法二
用bin目录下的工具mysqladmin
格式：mysqladmin -u用户名 -p旧密码 password 新密码
例子：mysqladmin -uroot -p123456 password 123
工具连接本地的mysql数据库
