On Fri, Jun 02, 2006 at 10:09:01AM -0700, operationsengineer1@yahoo.com wrote:
> Michael, my derivative of your query example works
> great - thank you!
>
> i think i understand everything except why multiplying
> by 1.0 is necessary. when i take it out, my expected
> result, 0.50000000000..., turns into 0 - so i assume
> it has to do with formatting the result.
Integer division yields integers, so 1 / 2 = 0 whereas 1.0 / 2.0 = 0.5.
The expression therefore needs something to force a non-integer result.
Multiplying by 1.0 (or 100.0) is one way; using 1.0 and 0.0 in the CASE
expression is another; casting one of the operands to numeric or one of
the floating-point types is yet another.
--
Michael Fuhr