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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] │
└───────────────────────────────────────────┘