[error]
node the command failed to start the project and reported an error: “unknown database ‘mydb'”

[other features]
at this time, view phpstudy and display “port occupied”.

[solution]
Start Run CMD, enter netstat - ano , look at the first column, followed by the port, find 3306, and remember the corresponding PID

Then open the task manager to view -> Select column -> Tick PID (process identifier) -> determine

Find the PID process in the task manager, check what program occupies the port, and close it

If you restart MySQL again, you will not report the error that the port is occupied. ⑤ use postman to test whether the background project interface is normal