Click on add Database link.

Step 2. Following are the input required fields as given below:
A. Assign a new database name in Database name.
B. Select related site name from the dropdown listed.
C. Check on create a new database user for that database.
D. Enter the database user name.
E. The passwords fields you can fill by generating a password or can input manually (maintain security policies).
F. Click on OK button to create the database.
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1. Can manage the database by clicking phpMyAdmin link.
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To access MySQL Database using phpMyAdmin, Please follow the below given KB link:
https://kb.diadem.in/index.php?View=entry&EntryID=434