# UniqueKey
<a name="API_UniqueKey"></a>

A `UniqueKey` configuration that references a dataset column.

## Contents
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**Note**  
In the following list, the required parameters are described first.

 ** ColumnNames **   <a name="QS-Type-UniqueKey-ColumnNames"></a>
The name of the column that is referenced in the `UniqueKey` configuration.  
Type: Array of strings  
Array Members: Fixed number of 1 item.  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Required: Yes

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/quicksight-2018-04-01/UniqueKey) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/quicksight-2018-04-01/UniqueKey) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/quicksight-2018-04-01/UniqueKey)