// The following example uses the hash function to // run a query on 10 % of the data | where hash ( StartTime , 10 ) == 0 An expression like hash(x) % 5 would mean that we want to get five (5) buckets of hashes. Taking the table above, if we’d want to get 20% of the hashes, we would write a function that would check if hash(x) % 5 == 0 , to get the chunk of the audience representative of the segment we want.