In the last episode (Jul 13), Dan Anderson said:
> I am curious about the internal representation of VARCHARS. I cannot
> find any documentation on it in the mySQL manual. Will a VARCHAR(10)
> take up less space then a VARCHAR(80), even though they are variable?
It's documented at least twice in the manual. See the section "The
CHAR and VARCHAR Types": http://www.mysql.com/doc/en/CHAR.html , and
also "Column Type Storage Requirements":