new table with a little different

Question

hello all

I have table1 with two columns

Name     existence

Apple        0
Banana     1

where 0 means  doesnt exist ,and 1 means exist..
I want to make a copy of table1  so that the copy ( in this case I named it table2)

So in table2 existense column change from the int value to boolean value.

How to do that ?

tq
denny