thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-09-21 01:00:48 +00:00
Code Issues Packages Projects Releases Wiki Activity
431a4718ae
ClickHouse/docs/en/sql-reference/aggregate-functions/reference/anyheavy.md
Ivan Blinkov 258d2fd499
[docs] split various kinds of CREATE queries into separate articles (#12328) 
* normalize

* split & adjust links

* re-normalize

* adjust ru links

* adjust ja/tr links

* partially apply e0d19d2aea

* reset contribs
2020-07-09 18:10:35 +03:00

719 B
Raw Blame History

toc_priority
103

anyHeavy

Selects a frequently occurring value using the heavy hitters algorithm. If there is a value that occurs more than in half the cases in each of the query’s execution threads, this value is returned. Normally, the result is nondeterministic.

anyHeavy(column)

Arguments

  • column – The column name.

Example

Take the OnTime data set and select any frequently occurring value in the AirlineID column.

SELECT anyHeavy(AirlineID) AS res
FROM ontime

┌───res─┐
│ 19690 │
└───────┘