> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-mintlify-fbfa8bee.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> Contains a list of all available aggregate function combinators, which could be applied to aggregate functions and change the way they work.

# system.aggregate_function_combinators

<h2 id="description">
  Description
</h2>

Contains a list of all available aggregate function combinators, which could be applied to aggregate functions and change the way they work.

<h2 id="columns">
  Columns
</h2>

* `name` ([String](/reference/data-types/index)) — The name of the combinator.
* `is_internal` ([UInt8](/reference/data-types/index)) — Whether this combinator is for internal usage only.
* `description` ([String](/reference/data-types/index)) — A high-level description of what the combinator does.
* `syntax` ([String](/reference/data-types/index)) — How the combinator is applied to an aggregate function name.
* `examples` ([String](/reference/data-types/index)) — Usage examples.
* `introduced_in` ([String](/reference/data-types/index)) — The ClickHouse version in which the combinator was first introduced, in the form major.minor.
* `related` ([Array(String)](/reference/data-types/index)) — The names of related combinators.