MySQL实验准备--环境准备

Posted 2020-11-18 东瑜

mysql实验脚本准备(一)

python操纵数据库的实验环境

• 安装pip
  1.下载脚本文件

  [[email protected] .vnc]# wget https://bootstrap.pypa.io/get-pip.py

  2.查看pip版本

  [[email protected] .vnc]# pip --version
  pip 10.0.1 from /usr/local/lib/python2.7/site-packages/pip (python 2.7)

  3.安装Pyton MySQLdb

  [[email protected] data]# pip install MySQL-python

MySQL 8.0用户&数据库&表的创建

• 数据库的创建
  1.数据库创建

  create database zdemo;
  use zdemo;

  2.数据库的语句查看

  mysql> show create database zdemo;
  +----------+----------------------------------------------------------------+
   | Database | Create Database                                                |
  +----------+----------------------------------------------------------------+
   | zdemo    | CREATE DATABASE `zdemo` /*!40100 DEFAULT CHARACTER SET utf8 */ |
  +----------+----------------------------------------------------------------+
  1 row in set (0.00 sec)

  数据库的字符集会默认给予，现在一般都是utf8。

• 表的创建
  1.表的创建语句

  CREATE TABLE student (
  id int unsigned NOT NULL auto_increment,
  stu_id MEDIUMINT unsigned  NOT NULL COMMENT ‘学号id‘,
  stu_name varchar(30) NOT NULL COMMENT ‘姓名‘,
  PRIMARY KEY  (`id`)
  );

  2.数据表语句的查看

  mysql> show create table zdemo.student;
  +---------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | Table   | Create Table                                                                                                                                                                                                                                          |
  +---------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | student | CREATE TABLE `student` (
    `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
    `stu_id` mediumint(8) unsigned NOT NULL COMMENT ‘学号id‘,
    `stu_name` varchar(30) NOT NULL COMMENT ‘姓名‘,
    PRIMARY KEY (`id`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8     |
  +---------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
    1 row in set (0.00 sec)

• 创建用户
  1.用户创建

  create user [email protected]‘%‘ IDENTIFIED WITH sha256_password BY ‘[email protected]‘ PASSWORD EXPIRE INTERVAL 360 DAY;

  2.赋予对zdemo数据库的增，删，改，查权限

  grant select,insert,update,delete on zdemo.* to [email protected]‘%‘;

  其中[email protected]‘%‘是匹配所有IP地址都可以访问这个数据库，权限管理应该设置为[email protected]‘192.168.35.%‘只匹配某一个网段，或者某个指定IP地址，由于实验环境。安全不做过多考虑。
  3.查看用户zsd的权限

  mysql> show grants for [email protected]‘%‘;
  +----------------------------------------------------------------+
   | Grants for [email protected]%                                               |
  +----------------------------------------------------------------+
   | GRANT USAGE ON *.* TO `zsd`@`%`                                |
   | GRANT SELECT, INSERT, UPDATE, DELETE ON `zdemo`.* TO `zsd`@`%` |
  +----------------------------------------------------------------+
  2 rows in set (0.01 sec)

python 链接MySQL数据库实例

• 实验环境状态
  客户端：10.1.11.18
  mysql服务端:10.1.11.170

• python链接实例语句

  #!/usr/bin/python
  # -*- coding: UTF-8 -*-
  import MySQLdb
  db = MySQLdb.connect("10.1.11.170", "zsd", "[email protected]", "zdemo", charset=‘utf8‘ )
  cursor = db.cursor()
  cursor.execute("SELECT VERSION()")
  data = cursor.fetchone()
  print "Database version : %s " % data
  db.close()

• 执行结果

  [[email protected] data]# python test.py
  Database version : 8.0.11

  目的：搭建好客户端和数据库端的基础环境，下一节通过编写python脚本，批量插入语句和查询语句，简单模拟负载。并通过基准测试收集mysql的性能状态变量。做分析研究