How to fix Error Establishing Database connection in wordpress

Learn How to Fix the "Error Establishing a Database Connection" Error on the Wordpress Website.
There are various Reasons for this Error such as the Database Credential Mismatch, the Database server being Down, the name server not Properly Connected to the Hosting Provider, a Sudden spike in Website Traffic, Or the database being Deleted.
Follow the Video to Learn How to Fix the WordPress “Error Establishing a Database Connection”.
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[@SubarnaBasnet]

Informative video.

[@voyagevista9.]

thank You

[@credshop3487]

bro this problem is showing again and again after 1-2hour, i have done this process 3 time even my website is take lots of time to open after doing this process

[@UsmanMustafvi]

Sir ap Sa bat kesy ho sakti I need little help

[@Key2Blogging]

Email or any social media platforms