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Support kurtosis(x) in Aggregation function #12250

Closed
Tracked by #12254
Weijun-H opened this issue Aug 30, 2024 · 4 comments
Closed
Tracked by #12254

Support kurtosis(x) in Aggregation function #12250

Weijun-H opened this issue Aug 30, 2024 · 4 comments
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enhancement New feature or request

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@Weijun-H
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Is your feature request related to a problem or challenge?

The excess kurtosis (Fisher's definition) with bias correction according to the sample size.

Describe the solution you'd like

D SELECT kurtosis(col) FROM VALUES (1), (10), (100), (10), (1) as tab(col);
┌───────────────────┐
│   kurtosis(col)   │
│      double       │
├───────────────────┤
│ 4.777292927667962 │
└───────────────────┘

Describe alternatives you've considered

No response

Additional context

https://clickhouse.com/docs/en/sql-reference/aggregate-functions/reference/kurtsamp
https://duckdb.org/docs/sql/functions/aggregates#kurtosisx

@Weijun-H Weijun-H added the enhancement New feature or request label Aug 30, 2024
@Weijun-H Weijun-H changed the title Support kurtosis(x) in Aggregation function Support kurtosis(x) in Aggregation function Aug 30, 2024
@jatin510
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take

@alamb
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alamb commented Sep 9, 2024

Given #12357 we may want to move this function to some other repo rather than the core

@alamb
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alamb commented Sep 16, 2024

Suggestion: #12254 (comment)

@alamb
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alamb commented Sep 25, 2024

We are going to implement these in a different repository so closing this ticket to avoid confusion: #12254 (comment)

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3 participants