xcode-select --install 

ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

brew doctor 

brew update 

brew info mariadb 

brew install mariadb 

unset TMPDIR 
cd /usr/local/Cellar/mariadb/10.0.10/ 
mysql_install_db 

mysql.server start 

➜ 10.1.14: mysql_secure_installation

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB 
  SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!

In order to log into MariaDB to secure it, we'll need the current 
password for the root user. If you've just installed MariaDB, and 
you haven't set the root password yet, the password will be blank, 
so you should just press enter here.

Enter current password for root (enter for none): 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) 
Enter current password for root (enter for none): 
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) 
Enter current password for root (enter for none): 
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MariaDB 
root user without the proper authorisation.

Set root password? [Y/n] Y 
New password: 
Re-enter new password: 
Password updated successfully! 
Reloading privilege tables.. 
 ... Success!


By default, a MariaDB installation has an anonymous user, allowing anyone 
to log into MariaDB 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.

Remove anonymous users? [Y/n] 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.

Disallow root login remotely? [Y/n] n 
 ... skipping.

By default, MariaDB 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.

Remove test database and access to it? [Y/n] 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.

Reload privilege tables now? [Y/n] Y 
 ... Success!

Cleaning up...

All done! If you've completed all of the above steps, your MariaDB 
installation should now be secure.

Thanks for using MariaDB! 

mysql -u root -p 

MariaDB [(none)]> select @@version; 
+-----------------+
| @@version  |
+-----------------+
| 10.1.14-MariaDB |
+-----------------+
1 row in set (0.00 sec) 

-- 显示数据库列表
show databases;

-- 切换到名为mysql的数据库，显示该库中的数据表
use mysql; 
show tables;

-- 显示数据表table的结构
desc table;

-- 建数据库A与删数据库A
create database `database_A`; 
drop database `database_A`;

-- 建表：
use database_A; 
create table table_A(字段列表); 
drop table table_A;

-- 显示表中的记录：
select * from table_A;

-- 清空表中记录：
delete from table_A;