MySQL foundation 02 - installing MySQL in non docker version

One : Why study databases ？

1、 Job skill requirements
2、 Now the world , Those who get data get the world
3、 How to store data
4、 Program , In the website , How to keep a lot of data for a long time ?
5、 Database is almost the core of the software system .

Two : What is a database

database ( DataBase , abbreviation DB )
Concept : Keep it in a computer for a long time , Organized , A collection of large amounts of data that can be shared , It's a number “ Warehouse ”
effect : preservation , And can manage data safely ( Such as : Add, delete, change, check, etc ), Reduce redundant …
Database Overview :

• Relational database ( SQL )

MySQL , Oracle , SQL Server , SQLite , DB2 , …

Relational database establishes the relationship between tables through foreign key Association

• Non relational database ( NOSQL )

Redis , MongoDB , …

Non relational databases usually refer to data stored in the database as objects , And the relationship between objects through each object from Determined by the attributes of the body

3、 ... and : What is? DBMS?

MySQL It should be a database management system .

MySQL brief introduction

Concept : It is now popular open source , Free of charge Relational database
history : The Swedish MySQL AB Companies to develop , At present belongs to the Oracle Its products .
characteristic :

• free , Open source database
• small , The function is all ready
• Easy to use
• Can run on Windows or Linux operating system
• It can be applied to small and medium-sized website applications

Official website : https://www.mysql.com/

install MySQL

Here we suggest that you use the compressed version , Quick installation , convenient . Not complicated .

mysql5.7 64 Bit download address :
https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.19-winx64.zip
The computer is 64 Download and use 64 A version of the ！

1、 Download and get zip Compressed package .
2、 Unzip to the directory you want to install to , What I decompressed is D:\Environment\mysql-5.7.19 3、 Add environment variables ： My computer -> attribute -> senior -> environment variable
3、 Add environment variables ： My computer -> attribute -> senior -> environment variable
choice PATH, Add after : Yours mysql Under the installation file bin Folder
4、 edit my.ini file , Pay attention to the replacement path location

[mysqld]
basedir=D:\Program Files\mysql-5.7
datadir=D:\Program Files\mysql-5.7\data
port=3306
skip-grant-tables

5、 Start... In administrator mode CMD, And switch the path to mysql Under the bin Catalog , Then input mysqld –install ( install mysql)

6、 Input again Initialization data file
7、 Then start again mysql And then by command mysql –u root –p Get into mysql Management interface （ The password can be empty ）
8、 Enter the interface and change root password

update mysql.user set authentication_string=password(‘123456’) where
user=‘root’ and Host = ‘localhost’;

9、 Refresh the permissions

flush privileges;

10、 modify my.ini File delete the last sentence skip-grant-tables
11、 restart mysql It can be used normally

net stop mysql
net start mysql

12、 The following results appear in the connection test and the installation is completed

Step by step , There is no problem in theory .
If you've installed , Now we need to reload , Be sure to clean up the environment .