reina@nsi.edu (Tony Reina) writes:
> db02=# select distinct arm from ellipse where exag_ratio = 1.0;
You never want to use the = test on floating point numbers. Two
apparently equal numbers may differ in the least significant digit.
The behavior will be close to random.
When you convert the floating point to a string and round off to a
specific number of digits, you can use string compare to get more
predictable results.
Another possibility is to do something like
where abs(exag_ratio - 1.0) > 0.000001
(I'm not sure about the SQL function for absolute value, but you get
the idea).
-Knut
--
The early worm gets the bird.
