一、mysql安装

1.旧版本卸载

rpm -qa | grep "mariadb"
rpm -ev 软件包名称 --nodeps

2.安装依赖

yum -y install gcc gcc-c++ ncurses ncurses-devel cmake bison bison-devel

3.mysql下载

yum安装（可选）

yum install mariadb-server mariadb mariadb-libs -y

源码下载（推荐）

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.25.tar.gz
wget http://nchc.dl.sourceforge.net/project/boost/boost/1.59.0/boost_1_59_0.tar.gz  
tar -xzvf  boost_1_59_0.tar.gz  
tar -xzvf  mysql-5.7.25.tar.gz

4.创建mysql用户

useradd -s /sbin/nologin mysql
mkdir -p /data/mysql 
chown -R mysql:mysql /data/mysql

5.cmake编译安装

cd mysql-5.7.25

cmake  .   -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DMYSQL_UNIX_ADDR=/tmp/mysql.sock -DMYSQL_DATADIR=/data/mysql -DDOWNLOAD_BOOST=1 -DWITH_BOOST=../boost_1_59_0 -DSYSCONFDIR=/etc -DMYSQL_USER=mysql -DMYSQL_TCP_PORT=3306 -DWITH_XTRADB_STORAGE_ENGINE=1 -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_PARTITION_STORAGE_ENGINE=1 -DWITH_BLACKHOLE_STORAGE_ENGINE=1 -DWITH_MYISAM_STORAGE_ENGINE=1 -DWITH_READLINE=1 -DENABLED_LOCAL_INFILE=1 -DWITH_EXTRA_CHARSETS=1 -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DEXTRA_CHARSETS=all -DWITH_BIG_TABLES=1 -DWITH_DEBUG=0

安装 make && make install

（也可使用make -j4 && make install 使用4个CPU提高速度，但是内存要足够，不然会报错）

5.添加环境变量

echo -e ‘\n\nexport PATH=/usr/local/mysql/bin:$PATH\n‘ >> /etc/profile && source /etc/profile

6.添加mysql至systemd，开启自启动

\cp /usr/local/mysql/support-files/mysql.server  /etc/init.d/mysqld 

chmod +x /etc/init.d/mysqld

systemctl enable mysqld

7.（可选）编辑配置文件

从5.7.18开始不在二进制包中提供my-default.cnf文件,所以不需要my.cnf也可以正常启动。，最好复制一份my.cnf使用

但是为了参数性能调优，则需要创建一个/etc/my.cnf,在官网上找一个配置文件进行修改,

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It‘s a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[client]
port = 3306
socket = /tmp/mysql.sock

[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
datadir = /data/mysql
port = 3306
server_id = 1
socket = /tmp/mysql.sock

log-bin = mysql-bin
expire_logs_days = 10
max_binlog_size = 100M
#general_log = 1
#general_log_file = /usr/local/mysql/query.log
slow_query_log = 1
slow_query_log_file = slow-query.log
long-query_time = 2
log-error = error.log

# Remove leading # to set options mainly useful for reporting servers.

# The server defaults are faster for transactions and fast SELECTs.

# Adjust sizes as needed, experiment to find the optimal values.

join_buffer_size = 128M

sort_buffer_size = 2M

read_rnd_buffer_size = 2M 

# sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 

8.初始化mysql

mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql

没有配置my.cnf显示告警如下，可以正常启动

注意：确保/data/mysql没有数据，有文件会报如下错误

9.启动mysql

systemctl start mysqld

正常运行

二、mysql常用命令

1.登录数据库

本地登录

 mysql -u root -p

设置密码（无密码）

mysql -uroot -ppassword -e "set passowrd for root = password(‘passowrd‘)"
或者

mysqladmin -uroot password "NEWPASSWORD"

修改用户密码

update mysql.user set authentication_string=password(‘新密码‘) where User=‘用户‘ and Host=‘主机‘;
flush privileges;

忘记密码

mysqld_safe --skip-grant-tables & 
# 也可在[ msyqld]选项中添加skip-grant-tables参数到/etc/my.cnf主配置文件中。（修改完要注释）
update mysql.user set authentication_string=password(‘新密码‘) where User=‘用户‘ and Host=‘主机‘;
flush privileges;

2.用户命令

select user();   #登录的用户
select user from mysql.user; # 数据库有哪些用户
create user ‘用户名‘@‘localhost‘ identified by ‘密码‘;           # 创建本地用户

create user ‘用户名‘@‘%‘ identified by ‘密码‘;                       # 创建远程登录

delete from user where User=‘用户‘ and Host=‘主机‘;flush privileges; 

或者drop user ‘用户名‘@ ‘localhost‘;      # 删除用户

grant 权限 on 数据库.* to ‘用户名‘@‘登录主机‘ identified by ‘密码‘;       #给用户添加权限

GRANT ALL PRIVILEGES ON *.* TO ’用户‘@‘登录主机’;             #给用户所有权限

revoke select on 数据库.*  from ‘用户’@‘登录主机‘;           # 取消对所有数据库的查询权限

show grants for ‘用户‘@‘主机‘;                              # 查看账户 的权限

3.操作数据库

use 数据库名;     切换数据库
show databases;                                                 #显示数据库  
show tables;                                                    #显示数据表
desc 数据表名;                                                  #显示数据表结构
desc 数据库名.数据表名; 
show create table 表名 \G；                                    #显示表详细结构
show create database DB_NAME;                                   #查看数据库字符集

select 字段名（多个字段用“,”隔开，*表示所有字段） from 数据表名;       #查询数据库的表
create database 库名;     #建库
drop database 库名;       #删库

create table 表名(字段列表);  #建表
drop table 表名;          #删表
delete table 表名;            #清空表

mysqladmin -uroot -p密码 shutdown     # 关闭数据库

4.数据备份与导入

mysqldump -uroot -p密码 --databases dbname  >/root/mysql_bak.sql  #导出数据库
mysqldump -uroot -p密码 < /root/mysql_bak.sql --default-character-set=utf8　#导入数据库

mysql
source /root/back.bak

5.索引

 ALTER TABLE t1 ADD PRIMARY KEY ( `column` )； # 主键索引 唯一不为空

ALTER TABLE t1 ADD UNIQUE (`column`)；           #唯一索引  唯一可为空

ALTER TABLE t1 ADD INDEX index_name ( `column‘ )； #普通索引  使用广泛

ALTER TABLE t1 ADD FULLTEXT ( `column` )；       #全文索引  用于MyISAM表，大量内容检索

ALTER TABLE t1 ADD INDEX index_name ( `column1`, `column2`, `column3` )；#组合索引  提高效率

6.配置远程连接mysql

GRANT ALL PRIVILEGES ON *.* TO ‘root‘@‘%‘ IDENTIFIED BY ‘Huawei12#$‘;

flush privileges;

正常登录

mysql5.7源码安装及常用命令