MySQL的一些基本操作

MySQL是一款轻量级的关系数据库。

ubuntu安装MySQL

root@ubuntu:~# sudo apt-get install mysql-server
root@ubuntu:~# apt isntall mysql-client
root@ubuntu:~# apt install libmysqlclient-dev

ubuntu安装MySQL可视化

个人感觉在ubuntu上比较好用的Mysql可视化程序是MySQL Workbench

安装MySQL Workbench过程：

在安装好Mysql后，输入以下命令。

sudo apt-get install mysql-workbench

MySQL一些基本操作

创建数据库，并设置中文字符编码

CREATE DATABASE database_name CHARACTER SET utf8;
USE database_name;

修改数据编码

ALTER DATABASE database_name CHARACTER SET utf8;

删除数据库

DROP DATABASE database_name;

创建数据表

CREATE TABLE table_name(
tutorial_id INT NOT NULL AUTO_INCREMENT,
tutorial_title VARCHAR(100) NOT NULL,
tutorial_author VARCHAR(40) NOT NULL,
submission_date DATA,
PRIMARY KEY (tutorial_id)
);

删除表

DROP TABLE table_name;

向mysql中插入csv文件数据

alter database NLPData character set utf8mb4 collate utf8mb4_unicode_ci;
create table emission(
id int not null auto_increment,
characters varchar(4) not null,
pinyin varchar(32) not null,
probability float4,
primary key(id)
);
alter table emission character set utf8 collate utf8_unicode_ci;
load data infile '/var/lib/mysql-files/emission.csv'
into table emission
fields terminated by ','
enclosed by '"'
lines terminated by '\n'
ignore 1 rows;

（未完待续……）