MySQL uninstallation and installation methods

Database uninstall

See this blogger for details https://blog.csdn.net/qq_45776730/article/details/123258877
1、 Open the registry （cmd–>regedit）

Delete the following three directories （ But I only found it in the first one MYSQL Catalog , The last two are not found ）

• HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Services/Eventlog/Application/MySQL
• HKEY_LOCAL_MACHINE/SYSTEM/ControlSet002/Services/Eventlog/Application/MySQL
• HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/Eventlog/Application/MySQL

2、 Control panel -> Procedures and functions -> uninstall with mysql Keywords are unloaded
3、 open c disc , Check hide file , You'll see a ProgramData Folder , Found inside MySQL Folder deletion （ Don't worry if you don't ）

4、cmd Command line input net stop mysql Shut down first mysql service , Then input sc delete mysql Delete MySQL service , The deletion success will be displayed . But after I input, the result is like this ：
It should be that it has been uninstalled completely

Press down win+R perform services.msc Access to services

---------- Now try to install it again --------------------

Database installation

1、 The first step was to download the installation package first I'm on the official website

A little explanation ：

Here I download a compressed package , Because the previous installation is to download one .msi, Then keep clicking next , But this method will install many unused things , Download the compressed package and install , Only pure database services are installed . See the blogger's

Preface ： Why not use installer Keep clicking on the next quick installation method and choose to configure manually zip Compressed version ？
One 、installer There are many options for installation , For many people, they don't know whether to choose some options , In fact, there are many things that do not need to be installed .mysql zip Compressed packages can only download pure database services
Two 、 Unloading is not clean ,installer Will write some data in the registry , If some professional software is not used to uninstall , The data in the registry may not be cleared , There may be other troubles in the future installation . When uninstalling the compressed package version, directly delete the service and put mysql Just delete the installation directory
3、 ... and 、zip Version installation can customize the installation location
Four 、zip Version can install multiple databases of different versions at the same time , Just need different service port numbers
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Copyright notice ： This paper is about CSDN Blogger 「 Xiao Li Qiuqiu 」 The original article of , follow CC 4.0 BY-SA Copyright agreement , For reprint, please attach the original source link and this statement .
Link to the original text ：https://blog.csdn.net/qq_45369284/article/details/123446789

Material display of two installation methods ：

2、 Put the compressed package where you want to install the database and extract the folder , I put it in D disc , I want to install the database in D disc , It's better not to have Chinese in this path

3、 Add environment variables
Everyone should be very skilled ,, ok , I'd better record it
3.1 Copy the folder path in the folder extracted in the previous step （ Copy path ）

3.2 This computer -> attribute -> Advanced system setup


Okay , Add completed ！
4、 mount this database （ Yes , The installation starts now ）
4.1 from Start , find powershell And Administrator status open
4.2、 install
( When you add environment variables ) Direct input mysqld --install ( If you don't need to add environment variables , Then go to the directory bin The next step is to execute )
here , Normally, it will report ：Service successfully installed.（ I succeeded in one step, haha ）
4.3 initialization
initialization mysql
Input mysqld --initialize --console, A random password will be generated , I've installed it here , So I can't take a screenshot , The initial password is ：A temporary password is generated for [email protected]: Initial password ( I'm covered up here , Your should have symbols ). At the back of this time ************ It's your initial password .
---------------- 4.2、4.3 Screenshot --------------------
All the subsequent operations are in Powershell In the , The screenshot here is in cmd In the terminal , But it seems all right emmmm

5、 Turn on mysql service ：net start mysql

6、 Verify login ：mysql -u root -p Then enter the password and appear mysql>> Then go to mysql

7、 Change Password ：ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
Back one root Password set for . After execution, a ：Query OK

8、 Reopen one Powershell terminal , Login again and enter the new password for verification ：mysql -u root -p
9、 I want to ensure success , I'm in again windows Common terminal （cmd） Input mysql -u root -p Verified with the new password , Can access the database server , It indicates that the server installation is successful

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This installation is based on the blogger's method ：https://blog.csdn.net/weixin_33543395/article/details/113383357