Error establishing a database connection in wordpress cpanel or localhost

If you find an error on database connection in wordpress cpanel or localhost
1. go to wordpress folder
3. change the password that you provided to create your database
or look for dbname,username, password or host name is in correct way

[emca]

I only have a wp-config-sample tho i dont have a wp-config when i downloaded my wordpress file. Do i have to make a wp-config php file? I followed the instructions, I'm still having the same problem.

[ros_na]

You can easily replace the WordPress with a new one, fast and easy, no need to think.

[titusajah]

Good, but the video was rather confusing