title: Oracle number to char leading 0
body: <p>I have a function that calculates number of days
  select (x * 0,5) from dual.
  my problem is tha when x=1 i get .5 instead of 0,5.What i want to get is numbers in format 0.5,1,1.5,2,2.5 ..
  Could you please give me a help with this.</p>