Error establishing a database connection

Error connecting to your database is common, but it isn’t necessarily a problem with wordpress itself.
– First, try contacting the hosting provider if the database server is online / if they have any other problem at their end, or they made any changes to your account, or if there are any limitations/restrictions, if the hosting package is set to Windows and not Linux, etc .
– double check your wp-config.php file settings for the database name, database username and database password. This is where most errors occur.
-Then check that you don’t need to change the database host from “localhost” to something else. You can get that info from your hosting provider.
-Check you have actually created a database with the same database name as is in your wp-config.php file.
-Last, but not least, if all that information is correct your database probably has a problem with it, and you may need to contact your hosting provider.
There are also many threads on this topic on these forums: https://www.ads-software.com/search/Error+establishing+a+database+connection?forums=1

yes, database connection erros is obvious when you migrate your files to another server or renamed dataabse

there are plenty of other reasons behind that –

i just search in google and find a ood details information on how to fix this perticular issue

[Link removed – Please read the forum rules and do not use these forums to promote your own site – https://codex.www.ads-software.com/Forum_Welcome#Helping_Out%5D

If you search for this in support you will see a million different threads which help to solve this problem. Most likely your database name, username or password is not correct in the wp-config.php file.