~name: x | $x.<column> : y | $y-><reduce>, or for Count rows ~name: x | 1 : y | $y->count(), which counts every row
~name: x | $x.<column> : y | $y-><reduce>
~name: x | 1 : y | $y->count()
~name: x | $x.<column> : y | $y-><reduce>, or for Count rows~name: x | 1 : y | $y->count(), which counts every row