OK, then my original message, which I deleted, was actually relevant after all. This will hopefully lead you on the right track:

Select field1, field2, cast(0 as n(8,2)) as max1, cast(0 as n(8,2)) as max2 .. from .. where ..

>Hi Cetin thanks for your reply.
>Cetin, i want empty verialbes form: obt01..........0bt24 but
>max01........max24 not empty
>if max01 has not empty and obt01 is empty(this is my requirement)