SQL Query OITM description of field SVolUnit

Hello,

In the OITM Table there are fields where the UOM is displayed, eg SVolUnit

When I use this field in a query i get a numbercode instead of a description.

How Can I get the full description of SVolUnit in a query like:

select T0[ItemCode], T0.[SVolUnit] from OITM T0 where...t0[ItemCode] >= '[%0]'

Thanks in advance Jos Dielemans