strange result for select * from table where id=random()*900

hi list,

this is my query:

select
*
from _g2977
where
id=floor(random() * (900));

in table _g2977 i have id(s) from 1 up to 900. i just want to select one random dataset by the above query but i does not work.

actually i get sometime zero, sometimes one, sometimes two and sometimes even three results back from the above query although i thought it should give only one random dataset from the table.

what is wrong?

i appreciate any help.

thanks in advance, stefan
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