Can't connect to MySQL server Error
 

Hi,
I am getting error message Database established connection error

Try to read some documentation.

If you have already created a localhost connection and its still showing can not connect then goto taskbar and find the MySQL notifier icon. Click on that and check whether your connection name is running or stopped. If its stopped then start or restart. I was facing the same issue but it fixed my problem.

check your connection maybe you are not writing the query correctly and also check that your server is on or not. if you are doing it on local otherwise if this issue is online please double check the database name username and password. maybe you are writing the incorrect credential or one more thing maybe you have not assign all privileges to the user you created for the database.