For example here is a function in a controller which adds a few records to "mytable". I guess you already know how to define tables.
def myfunction():
...
db.mytable.insert(user_id=4,court_id=5,perm='C',days=10)
db.mytable.insert(user_id=4,court_id=5,perm='V',days=365)
db.mytable.insert(user_id=4,court_id=9,perm='C',days=10)
db.mytable.insert(user_id=4,court_id=9,perm='V',days=365)
...
Try reading the DAL chapter of the book, it mentions various examples for
you to follow.
Regards, David

