User-defined SQL Function

Does anyone have an idea how to implement the following?

I have a table t1 with 20 columns, say c1-c20. I would like to write a function that I can call like this:

select func(99999) from t1;

The 99999 will be replaced with a bit-representation of the columns that I wish to add together. For example, if I execute func(5), it will return c3+c1, func(7) will return c3+c2+c1, func(15) will return c4+c3+c2+c1.

I can't think of a straightforward way of doing this. Any help will be greatly appreciated.

Thanks,

Dave Zuzga
dzuzga_at_isdinc.com Received on Tue Jul 11 2000 - 00:00:00 CDT