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22 lines
603 B
Markdown
22 lines
603 B
Markdown
<a name="aggregate_functions"></a>
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# Aggregate functions
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Aggregate functions work in the [normal](http://www.sql-tutorial.com/sql-aggregate-functions-sql-tutorial) way as expected by database experts.
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ClickHouse also supports:
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- [Parametric aggregate functions](parametric_functions.md#aggregate_functions_parametric), which accept other parameters in addition to columns.
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- [Combinators](combinators.md#aggregate_functions_combinators), which change the behavior of aggregate functions.
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**Table of Contents**
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```eval_rst
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.. toctree::
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reference
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parametric_functions
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combinators
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```
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