mac上安装和设置mysql

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一）安装mysql
brew install mysql

二）check是否安装成功，里面存在mysql
brew list

三）设置mysql安装的基本设置
mysql.server start 启动mysql服务
mysql_secure_installation mysql安装的基本设置

$ mysql_secure_installation

Securing the MySQL server deployment.

Connecting to MySQL using a blank password.

VALIDATE PASSWORD PLUGIN can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords which are
secure enough. Would you like to setup VALIDATE PASSWORD plugin?
// 提示是否设置密码
Press y|Y for Yes, any other key for No: y
// 提示选择密码强度等级
There are three levels of password validation policy:

LOW    Length >= 8
MEDIUM Length >= 8, numeric, mixed case, and special characters
STRONG Length >= 8, numeric, mixed case, special characters and dictionary                  file

Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 1
Please set the password for root here.
// 按照所选的密码强度要求设定密码
New password: 

Re-enter new password: 

// 提示密码强度50,不符合要求重新设置密码
Estimated strength of the password: 50 
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y
 ... Failed! Error: Your password does not satisfy the current policy requirements

New password: 

Re-enter new password: 
// 提示密码强度100,符合要求继续进行
Estimated strength of the password: 100 
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.
// 提示删除默认无密码用户
Remove anonymous users? (Press y|Y for Yes, any other key for No) : y
Success.


Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.
// 提示禁止远程root登录
Disallow root login remotely? (Press y|Y for Yes, any other key for No) : no

 ... skipping.
By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.

// 提示删除默认自带的test数据库
Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y
 - Dropping test database...
Success.

 - Removing privileges on test database...
Success.

Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.
// 提示是否重新加载privilege tables
Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y
Success.

All done! 

四）使用新密码登录mysql
$ mysql -u root -p

五）其他常用操作数据库命令

create database testmysql; 创建数据库
show databases; 查询数据库
drop database testmysql; 删除数据库
use testmysql 选择数据库

create table personTable (personID int, name varchar(20), gender varchar(10), primary key(personID)); 创建数据库表
drop table personTable; 删除数据库表
describe personTable; 查看数据库表
alter table personTable rename newpersonTable; 修改数据库表名称
alter table newpersonTable add sex int; 修改数据库表结构
alter table newpersonTable drop gender; 删除数据库表字段

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