# DifferentialPrivacyColumn
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Specifies the name of the column that contains the unique identifier of your users, whose privacy you want to protect.

## Contents
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 ** name **   <a name="API-Type-DifferentialPrivacyColumn-name"></a>
The name of the column, such as user\$1id, that contains the unique identifier of your users, whose privacy you want to protect. If you want to turn on differential privacy for two or more tables in a collaboration, you must configure the same column as the user identifier column in both analysis rules.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 128.  
Pattern: `[a-z0-9_](([a-z0-9_ ]+-)*([a-z0-9_ ]+))?`   
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/cleanrooms-2022-02-17/DifferentialPrivacyColumn) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/cleanrooms-2022-02-17/DifferentialPrivacyColumn) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/cleanrooms-2022-02-17/DifferentialPrivacyColumn)