he was probably talking about MySQL function:
SELECT ROUND(money,2) FROM ....
i am not sure coz i have never used it. you can check MySQL functions and make numbers come "prepared" from your result set or you read numbers as they are and use PHP function - thats what i usually do:
$x = <your number here>;
$xOnedecimal = number_format($x, 1);
"number_format" is pretty cool function to use...