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dcount_hll()

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  • قراءة خلال 2 دقائق

Calculates the dcount from hll results (that were generated by hll or hll_merge).

Read about the underlying algorithm (HyperLogLog) and estimation accuracy.

Syntax

dcount_hll(Expr)

Arguments

Returns

The distinct count of each value in Expr

Examples

StormEvents
| summarize hllRes = hll(DamageProperty) by bin(StartTime,10m)
| summarize hllMerged = hll_merge(hllRes)
| project dcount_hll(hllMerged)
dcount_hll_hllMerged
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