I do not know if I have understood the question properly... Do you want the SQL syntax to delete tables and databases, or do you want to know how to do it using phpmyadmin?
I will begin with the second option... Just follow the right path through the interfaces of phpmyadmin
Select a database, you'll have the list of tables belonging to that database and you can update/delete/empty them. Regarding the deletion of a database itself, move on to the top-level "database"...
Regarding SQL syntax:
Removing a table from a database
DROP TABLE 'table_name';
Deleting a database
DROP DATABASE 'database_name';
Hope it helps...
If not, please be more precise with your question...
PS: something completely different: are you a student in Stockholm? Because I live there too!