Question about the width of the table

tumbero_x

Hello Good morning!
I am working on a table and am using "sScrollY": "350px",
but using this option does not respect me the width of the table is 100%
if I add "sScrollX": "100%" respect me there If I do not want the width to display the horizontal scroll
there is a way to solve
leave a snapshot (this happens when in full screen)
http://www.sincroniavirtual.com/tabla.jpg
Greetings and Thanks!