Check for typos: Carefully review your database credentials for any typos. Repair database: If the database might be corrupted, try running a database repair tool provided by your hosting provider.

Here's how, if you follow the right instructions, you can deal with a common WordPress problem and get back on working on your content.

My credentials is correct and its same on my wp-config-sample.php but it still shows that there is an error establishing my database connection. Can someone help me ...