Tuples --> How to use them ?

[Marcus Vinicius Laranjeira]

All,

Supose I have an arbitrary tuple of values that came from a sql query. I 
need to run this algorithm:

t1 <-- new tuple
t1 <-- results from an arbitrary query
l <-- new list
for each value in the tuple do:
     a <-- new tuple
     add this value to the tuple a
     add the tuple a to a the list l

i.e. I need to create a list of tuples and these tuples will have one, and 
only one, number that came from the original tuple.

Does anyone know how do I do that !?

thanks in advance,

Marcus