As Jeff suggested you can use the CREATE TABLE AS SELECT, just remember also, you'll need to recreate your indexes and issue grants again to the newly table.

Sometime what I do is

a). CREATE TABLE new_table_temp AS ...

b). Take note of the grants adn indexes.

c). Drop the OLD table

d). CREATE TABLE old_name AS SELECT * FROM new_table_temp

e). Create indexes etc and grants

f). Drop table new_table_temp;

Cheers,