Question

sometimes when I write sql I encounter the following situation:

select A = (
               select sum(A)
               --... big query using abc
           ),
select B = (
               select sum(B)
               --... same big query using abc
           )
from abc

Maybe it doesn’t look very well, but it’s the only way I can think of in some situations. So the question is: big query is repeated, perhaps there is a cleaner way to write same thing?

Clarifications: abc is a bunch of joins. using abc means using current abc row’s data. big query is not the same as abc.

Answer 1

Outer apply will help here:

   select *
   from abc
    outer apply (
      select sum(a) as sumA, sum(b) as sumB
      -- big query using abc
   ) sums