[O] shrink latex table to fit beamer slide

[Zhihao Ding]

Dear Org experts, 

I am trying to fit a slightly wide latex table into a beamer 
slide in org. Below is my current solution and I was wondering 
if anyone can offer some advice on improving it. 

     #+begin_scriptsize
     #+ATTR_LATEX: :align p{1cm} p{0.5cm} p{1cm}
     |           |     |     <7> |
     |      Site | Ind | -log10.pval |
     | 123279713 |   1 | 6.006102 |
     | 123279713 |   2 | 6.274326 |
     | 123279713 |   4 | 6.210920 |
     | 123279710 |   4 | 97.163695 |
     | 123279710 |   5 | 208.841892 |
     #+end_scriptsize

In this solution, the issues are: (1) <N> for column width 
doesn’t seem to round text for latex output, and (2) I need
to define column width in addition to <N>. 
I’d like to seek a solution that just shrinks the table to fit 
the text width without this fiddling. 

Many thanks, 
Zhihao