The next day I learned sql, but it took half a day for the goose to install a mysql today, but there were some differences in the tutorials on the Internet. I tried every method, mainly because the mysql service was started and I couldn't understand why. There will be two similar services,
The properties are: "C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe" MySQL
"C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqld.exe" --defaults-file="C:\ProgramData\MySQL\MySQL Server 5.7\my.ini" MySQL57
I think I should continue to understand the principles of SQL again.