---
description: 'Overview of special data types in ClickHouse that are used for intermediate
  results during query execution'
sidebar_label: 'Special Data Types'
sidebar_position: 55
slug: /sql-reference/data-types/special-data-types/
title: 'Special Data Types'
---

# Special data types

Special data type values can't be serialized for saving in a table or output in query results, but can be used as an intermediate result during query execution.
