Detailed steps to install mysql 5.1
Download mysql5.1 compressed package
Download link: https://pan.baidu.com/s/1bm39EQme9Jng05sDwAyKzw
Extraction code: f8es
Unzip the compressed package
Unzip the downloaded installation package and get a mysql folder
Install mysql
Open the mysql folder, find SQLyog_v12.3.1.exe, and run it, choose the directory you want to install.
After the installation is complete, there will be a SQL icon on the desktop to run.
Use SQL
After opening, select New, enter the name, and create a new link. After the creation is complete, open the mysql folder, select MySQL5.1 Lite, and run the MySQL management tool.exe to get the following interface: 
enter 0 in the window and press the enter key, and you will get the following interface:
enter the new password, click enter, Enter B and click Enter, as shown in the figure: 
Then enter Y and click Enter, as shown in the figure: the 
password is changed.
Go back to SQL and enter the modified password in the password field, as shown in the figure: 
click on the link, and the link is successful. (If the connection fails, re-run the MySQL management tool.exe and perform the above steps)