[MySQL learning] install and use multiple versions of MySQL, MySQL 8 and MySQL 5.7 at the same time, compressed version

Compressed version mysql uninstall

Administrator access bin Under the table of contents

mysqld -remove  service name 

View port usage

netstat -ano

Query use and forced shutdown of ports

mysql8 Compressed version installation tutorial

1. Copy my.ini File to the installation directory

[mysql]
#  Set up mysql Client default character set 
default-character-set=utf8
[mysqld]
#  Set up 3306 port 
port=3306
#  Set up mysql Installation directory 
basedir=D:\Programs\mysql-8.0.28-winx64
#  Maximum connections allowed 
max_connections=20
#  The character set used by the server defaults to 8 Bit coded latin1 Character set 
character-set-server=utf8
#  The default storage engine that will be used when creating a new table 
default-storage-engine=INNODB

2. Enter the installation directory as an administrator bin Under the table of contents ,mysql8 For the service name, it is convenient to distinguish the started mysql edition

mysqld install mysql8

3. initialization mysql

>mysqld --initialize --console
 The last line prompts  [Server] A temporary password is generated for [email protected]: xxxxxxx
xxxxxxx It's the database root User's initial password 

4. start-up mysql service

>net start mysql8

5. Connect to database

>mysql -u root [-P 3306] -p Vk#0ymxXtt9b

6. Change password

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '12345678';

7. Exit connection ：

mysql>quit

mysql57 Installation tutorial ：

1. Copy my.ini File to the installation directory

The contents are as follows ：

[client]
#  Set up mysql Client default character set 
default-character-set=utf8
[mysqld]
#  Set up 3307 port , Avoid conflicts with installed 
port = 3307
#  Set up mysql Installation directory 
basedir=D:\Programs\mysql-5.7.38-winx64
#  Set up  mysql Database data storage directory 
datadir=D:\Programs\mysql-5.7.38-winx64\data
#  Maximum connections allowed 
max_connections=20
#  The character set used by the server defaults to 8 Bit coded latin1 Character set 
character-set-server=utf8
#  The default storage engine that will be used when creating a new table 
default-storage-engine=INNODB

2. If you need to install two versions mysql At present, this is the second mysql When ,

For convenience , Need to put bin In the catalog mysql.exe and mysqld.exe rename , For example, I changed it here to mysql57.exe and mysqld57.exe, Be careful my.ini The port inside cannot be the same as the one in front , If Install only one version Of mysql You can skip this step

3. Enter the installation directory as an administrator , hinder mysql57 It's the service name

bin>mysqld57 install mysql57

4. initialization MySQL Service at this time root Users can log in without a password ：

> mysqld57  --initialize-insecure --user=mysql

5. start-up mysql service ：

> net start mysql57

6. Establish a database connection , Since the port is set here, you need to specify the port connection , The default is 3306：

> mysql57 -u root -P 3307 -p

7. Change the password after establishing the connection ：

set password for [email protected] = password('123456');

Setting environment variables does not need to enter every time bin Directory start

In the system variable Path Two new records are added in , Namely mysql8 and mysql57 Of bin Catalog

Run command prompt as Administrator (CMD).

Successful startup