how to copy a table , complete

i searched the forums for an answer , and didnt
find exactly what im looking for .. so heres the
question ..

i have a table called mytable , i want a script
to copy it completely to a table called mytable2

i also want the script do drop mytable2 if
it already exists and then copy mytable.

what commands do i use ?
the INSERT command can only insert data
into an existing table but i cant seem to make
it create the table as well .

next step : can a script be made to copy
a whole DB ? without using external tools ?

thanks in advance for any help .