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# AWS::CleanRooms::ConfiguredTable DifferentialPrivacyColumn
<a name="aws-properties-cleanrooms-configuredtable-differentialprivacycolumn"></a>

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

## Syntax
<a name="aws-properties-cleanrooms-configuredtable-differentialprivacycolumn-syntax"></a>

To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-cleanrooms-configuredtable-differentialprivacycolumn-syntax.json"></a>

```
{
  "[Name](#cfn-cleanrooms-configuredtable-differentialprivacycolumn-name)" : {{String}}
}
```

### YAML
<a name="aws-properties-cleanrooms-configuredtable-differentialprivacycolumn-syntax.yaml"></a>

```
  [Name](#cfn-cleanrooms-configuredtable-differentialprivacycolumn-name): {{String}}
```

## Properties
<a name="aws-properties-cleanrooms-configuredtable-differentialprivacycolumn-properties"></a>

`Name`  <a name="cfn-cleanrooms-configuredtable-differentialprivacycolumn-name"></a>
The name of the column, such as user\_id, 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.  
*Required*: Yes  
*Type*: String  
*Pattern*: `[a-z0-9_](([a-z0-9_ ]+-)*([a-z0-9_ ]+))?`  
*Minimum*: `0`  
*Maximum*: `128`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)