using the database Oracle for this book,and some ".sql" files
you can visit the webiste for more details:
https://www.db-book.com/university-lab-dir/sqljs.html
when you first run the college.sql,there may be some error reports: xxx table is not exits;
you can just comment the first statement in college.sql which is @/home/oralce/Oralce_WLC/drop_all_table.sql;
i have to admit that the design of the tables is very excellent.especially for some table's foreign key ... on delete set null OR ....on delete cascade; then you can't drop a table arbitrarily.
so i write down the drop_all_table.sql for we can drop all table in the correct order.