hi all:
i have a question at Frequent Distinct Tuples
Sketch。 a multiset of tuples with N dimensions {d1,d2, d3,
…, dN}，FDT could base on any of dimensions
and approximate count distinct left dimensions。eg: select
appromate group by(d1,d2),count distinct {d2,...dn} from sketches
group by (d1,d2)。 is there a way to group any of dimensions
and count distinct any of left dimensions, eg: select appromate
group by(d1,d2),count distinct d3 from sketches group by (d1,d2)
