How to select date + 1 month ?

Hi, I wonder if there is any way to directly select a date + xx month from an informix sql-table. I could select a "16.8.1993" + 30 from anytable which adds 30 days to the date, but is there also a way to do this with month's or years ? This would be much easier than programming lots of date routines. Thanks Christoph -- Origin: It's not a bug, it's a feature !