Error Establishing A Database Connection in WordPress

[Chris]

Hi,

I have installed WordPress successfully and I installed theme from WordPress admin area. It was working fine several hours ago but now it is showing the following error:

Error establishing a database connection

I did not make any changes in database or database user. How can I fix it?

Thanks,

[Kailash]

Hello,

There can be several reasons for this error as follow:

[1] If there is any issue with MySQL service on the server. If other MySQL related websites are working fine, this should not be the reason.

[2] If there any database table corruption, you may receive this error. You can try to repair the table from phpMyAdmin or from control panel (if there is any option).

- Kailash