Sum a column excluding certain rows

[Wyatt]

Is it possible to sum a column without including all rows in that column.

IE
a  2
b  3
c  2
d  8
sum = 12

but only sum up a+c+d

[Nikolay Rusev]

Hello Wyatt,

I'm afraid that this is not supported. The `sum` aggregate sums the values from all data items.

Regards,
Nikolay Rusev
the Telerik team