mysql学习笔记1

1 Mysql安装

rpm -ivh mysql-libs-5.1.73-3.el6_5.x86_64.rpm

rpm -ivh perl-DBD-MySQL-4.013-3.el6.x86_64.rpm

rpm -ivh mysql-5.1.73-3.el6_5.x86_64.rpm

rpm -ivh mysql-server-5.1.73-3.el6_5.x86_64.rpm

设置开机自启动

chkconfig mysqld on

启动

netstat -nlp

service mysqld start

配置外网3306端口可以访问

vim /etc/sysconfig/iptables

-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT

配置外网访问数据库

mysql -uroot

use mysql

update user set host='%' where host='127.0.0.1' and user='root';

2 mysql配置

配置文件路径：/etc/my.cnf

配置文件样例：/usr/share/mysql下

ls *.cnf 可以根据实际需要将样例配置文件复制到/etc下改名为my.cnf重启mysql生效

2 sql基础

ddl:show databases;

create database test1;

drop database test1;

授出权限：grant select,insert on test.* to 'xiaolq'@'localhost' identified by '123';

收回权限：revoke select,insert on test.* from 'xiaolq'@'localhost';

3 帮助的使用

? contents

? Data Types

4 information_schema库存储元数据，都是视图；