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How do you retrieve a column total for a category?
As it turns out, @DbColumn will return totals and subtotals on categories, and not the individual line items. Therefore, if you have the correct hidden view, you don't have to resort to that lengthy @Sum at all!!
Case in point:
If you want to retrieve that 22 from the hidden view, don't use @DbLookup (which will return 11;10;1), instead use 2 @DbColumns:
x:="Oranges"; Usually you use an @Prompt to get this value
a:=@DbColumn("";"";"(Fruit Count)";1); Returns "Apples":"Oranges":"Bananas"
b:=@DbColumn("";"";"(Fruit Count)";3); Returns 16:22:13:51
c:=@Member(x;a); Look for where Oranges appears in the list (2nd)
d:=@If(c=0;-1;c); @Subset crashes if it sees a 0, so this is to prevent that
e:=@Subset(@Subset(b;d);-1); Select the proper (2nd) item out of the number list (22)
@If(c=0;"No Match";e) Other half of @Subset workaround, returns 22, the proper answer.