MS SQL:
The database can be accessed using the following CLI command:
C:\Program Files\Microsoft SQL Server\80\Tools\Binn\osql –E
Or you can use the Microsoft SQL Server Management Studio Express
MySQL
Run the following command in 'command prompt'
cd %plesk_dir%\MySQL\bin
mysql -P8306 -uadmin -p psa
MS ACCESS DB (JET)
Use any utility that can used with MS ACCESS (.mdb) files
The Plesk database file is located in %plesk_dir%\admin\db\psa.mdb
Thanks :)