Read the manual for date arithmetic.
>hi all,
>
>any idea,help how i can make this operatins...
>
>1.date(+,-,/,*)date=duration
>
>2.duration(+,-,/,*)date=date
>
>3.duration(+,-,/,*)duration=duration
>
>
> thanks.
(On an infant's shirt): Already smarter than Bush