There are two ways you can get rid of a table first is asBJ Cooper suggested simple
SQL> drop table publisher;
NOTE: This will remove the entire table structure, its content, and constraints. Basically the table will be completely deleted from the database!
The second method is:
SQL>delete from publisher;
NOTE: This will delete all the rows in the table not the table structure so you can populate the table again.
or you can use truncate, but i won't go into that, hope this helps!
Regards
Bobby