How to manage multiple databases with the same user via phpMyAdmin in Plesk?

Question

How to manage multiple databases with a single user via phpMyAdmin or MyLittleAdmin in Plesk?

Answer

For phpMyAdmin (MySQL):

1. Log into Plesk.
2. Go to Domains > example.com > Databases > User Management > Add Database User.
3. Create a user with access to Any database:
   
4. Configure access to phpMyAdmin without login to Plesk as described in the following article:
   How to access phpMyAdmin shipped in Plesk without login to Plesk URL itself?
5. Browse to https://<Plesk-server-host-name-or-IP>:8443/phpmyadmin and access using the user created on step 3.

For MyLittleAdmin (MS SQL):

1. Log into Plesk.
2. Go to Domains > example.com > Databases > User Management and click Add Database User.
3. Create a user with access to Any database:
   
4. Via Domains > example.com > Databases > Add Database create a sample empty_database without a user:
   
5. Click myLittleAdmin button near the database created on step 4: