Hello,

For updating a lot of references in your database, you could either use the wp-cli tool or the following script:

https://interconnectit.com/products/search-and-replace-for-wordpress-databases/

If you decide to go with the wp-cli tool, the command that you would need to use would look something like this:

wp search-replace 'OLD STRING' 'NEW STRING'

It is best to run that command from within the document root directory so that the tool could pick up the database details from your wp-config file.

Note that this is a really dangerous operation as it can mess up your whole database in case anything goes wrong so it is very important to always make a backup of your database before proceeding with the operation.

Hope that this helps!
Regards,
Bobby