topKWeighted
Similar to topK
but takes one additional argument of integer type - weight
. Every value is accounted weight
times for frequency calculation.
Syntax
topKWeighted(N)(x, weight)
Parameters
N
— The number of elements to return.
Arguments
x
– The value.weight
— The weight. UInt8.
Returned value
Returns an array of the values with maximum approximate sum of weights.
Example
Query:
SELECT topKWeighted(10)(number, number) FROM numbers(1000)
Result:
┌─topKWeighted(10)(number, number)──────────┐
│ [999,998,997,996,995,994,993,992,991,990] │
└───────────────────────────────────────────┘
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