Vinicius,

> select FIELD1 from TABLE into :FLOAT;
> FIELD1 is a time stamp
> and I need this time in a double precision variable to make a math
> operation.
> How can i do this?

It could be just me, but I still don't get it.
How can you possibly do math operations on a value that is not a number?
What would be the float equivalent of today's noon, for example?
What that of Wednesday morning, 3 AM?

Perhaps you are confusing with Delphi's TDateTime (which stores a date
and time in a Double variable)?
Still puzzled...
Ciao
--
____
_/\/ando