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# AWS::S3Tables::Table IcebergSortOrder
<a name="aws-properties-s3tables-table-icebergsortorder"></a>

Defines the sort order for data within an Iceberg table. Sorting data can improve query performance by enabling more efficient data skipping.

## Syntax
<a name="aws-properties-s3tables-table-icebergsortorder-syntax"></a>

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

### JSON
<a name="aws-properties-s3tables-table-icebergsortorder-syntax.json"></a>

```
{
  "[Fields](#cfn-s3tables-table-icebergsortorder-fields)" : [ IcebergSortField, ... ],
  "[OrderId](#cfn-s3tables-table-icebergsortorder-orderid)" : Integer
}
```

### YAML
<a name="aws-properties-s3tables-table-icebergsortorder-syntax.yaml"></a>

```
  [Fields](#cfn-s3tables-table-icebergsortorder-fields): 
    - IcebergSortField
  [OrderId](#cfn-s3tables-table-icebergsortorder-orderid): Integer
```

## Properties
<a name="aws-properties-s3tables-table-icebergsortorder-properties"></a>

`Fields`  <a name="cfn-s3tables-table-icebergsortorder-fields"></a>
The list of sort fields that define how data is sorted within files. Each field specifies a source field, sort direction, and null ordering. This field is required if `writeOrder` is provided.  
*Required*: Yes  
*Type*: Array of [IcebergSortField](aws-properties-s3tables-table-icebergsortfield.md)  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`OrderId`  <a name="cfn-s3tables-table-icebergsortorder-orderid"></a>
The unique identifier for this sort order. If not specified, defaults to `1`. The order ID is used by Apache Iceberg to track sort order evolution.  
*Required*: No  
*Type*: Integer  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)