Install MySQL:
Note that some options are not the same as the default, as shown in the figure. Also, if you are reinstalling MySQL, be careful to back up the MySQL directory of the data directory, this directory is the directory of all users, very important, can not be careless.
When reloading, back up the good data, first uninstall the old MySQL, and delete the original MySQL installation directory.
Please note that the Custom option is selected in the above image to modify the installation directory.
Please note that for data security, do not install MySQL on the system disk, such as C: disk.
Note the settings in the above diagram to change the number of concurrent connections for MySQL to 1000.
Please note that the MySQL service name is selected as "MySQL" in the image above, and do not use other symbols.
The password in the image above is the password of the MySQL administrator root.
This MySQL installation was successful.