Amazon Forecast is no longer available to new customers. Existing customers of Amazon Forecast can continue to use the service as normal. [Learn more"](https://aws.amazon.com/blogs/machine-learning/transition-your-amazon-forecast-usage-to-amazon-sagemaker-canvas/)

# CreateDatasetGroup
<a name="API_CreateDatasetGroup"></a>

Creates a dataset group, which holds a collection of related datasets. You can add datasets to the dataset group when you create the dataset group, or later by using the [UpdateDatasetGroup](https://docs.aws.amazon.com/forecast/latest/dg/API_UpdateDatasetGroup.html) operation.

**Important**  
Amazon Forecast is no longer available to new customers. Existing customers of Amazon Forecast can continue to use the service as normal. [Learn more"](http://aws.amazon.com/blogs/machine-learning/transition-your-amazon-forecast-usage-to-amazon-sagemaker-canvas/) 

After creating a dataset group and adding datasets, you use the dataset group when you create a predictor. For more information, see [Dataset groups](https://docs.aws.amazon.com/forecast/latest/dg/howitworks-datasets-groups.html).

To get a list of all your datasets groups, use the [ListDatasetGroups](https://docs.aws.amazon.com/forecast/latest/dg/API_ListDatasetGroups.html) operation.

**Note**  
The `Status` of a dataset group must be `ACTIVE` before you can use the dataset group to create a predictor. To get the status, use the [DescribeDatasetGroup](https://docs.aws.amazon.com/forecast/latest/dg/API_DescribeDatasetGroup.html) operation.

## Request Syntax
<a name="API_CreateDatasetGroup_RequestSyntax"></a>

```
{
   "DatasetArns": [ "string" ],
   "DatasetGroupName": "string",
   "Domain": "string",
   "Tags": [ 
      { 
         "Key": "string",
         "Value": "string"
      }
   ]
}
```

## Request Parameters
<a name="API_CreateDatasetGroup_RequestParameters"></a>

The request accepts the following data in JSON format.

 ** [DatasetArns](#API_CreateDatasetGroup_RequestSyntax) **   <a name="forecast-CreateDatasetGroup-request-DatasetArns"></a>
An array of Amazon Resource Names (ARNs) of the datasets that you want to include in the dataset group.  
Type: Array of strings  
Length Constraints: Maximum length of 256.  
Pattern: `arn:([a-z\d-]+):forecast:.*:.*:.+`   
Required: No

 ** [DatasetGroupName](#API_CreateDatasetGroup_RequestSyntax) **   <a name="forecast-CreateDatasetGroup-request-DatasetGroupName"></a>
A name for the dataset group.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 63.  
Pattern: `^[a-zA-Z][a-zA-Z0-9_]*`   
Required: Yes

 ** [Domain](#API_CreateDatasetGroup_RequestSyntax) **   <a name="forecast-CreateDatasetGroup-request-Domain"></a>
The domain associated with the dataset group. When you add a dataset to a dataset group, this value and the value specified for the `Domain` parameter of the [CreateDataset](https://docs.aws.amazon.com/forecast/latest/dg/API_CreateDataset.html) operation must match.  
The `Domain` and `DatasetType` that you choose determine the fields that must be present in training data that you import to a dataset. For example, if you choose the `RETAIL` domain and `TARGET_TIME_SERIES` as the `DatasetType`, Amazon Forecast requires that `item_id`, `timestamp`, and `demand` fields are present in your data. For more information, see [Dataset groups](https://docs.aws.amazon.com/forecast/latest/dg/howitworks-datasets-groups.html).  
Type: String  
Valid Values: `RETAIL | CUSTOM | INVENTORY_PLANNING | EC2_CAPACITY | WORK_FORCE | WEB_TRAFFIC | METRICS`   
Required: Yes

 ** [Tags](#API_CreateDatasetGroup_RequestSyntax) **   <a name="forecast-CreateDatasetGroup-request-Tags"></a>
The optional metadata that you apply to the dataset group to help you categorize and organize them. Each tag consists of a key and an optional value, both of which you define.  
The following basic restrictions apply to tags:  
+ Maximum number of tags per resource - 50.
+ For each resource, each tag key must be unique, and each tag key can have only one value.
+ Maximum key length - 128 Unicode characters in UTF-8.
+ Maximum value length - 256 Unicode characters in UTF-8.
+ If your tagging schema is used across multiple services and resources, remember that other services may have restrictions on allowed characters. Generally allowed characters are: letters, numbers, and spaces representable in UTF-8, and the following characters: \$1 - = . \$1 : / @.
+ Tag keys and values are case sensitive.
+ Do not use `aws:`, `AWS:`, or any upper or lowercase combination of such as a prefix for keys as it is reserved for AWS use. You cannot edit or delete tag keys with this prefix. Values can have this prefix. If a tag value has `aws` as its prefix but the key does not, then Forecast considers it to be a user tag and will count against the limit of 50 tags. Tags with only the key prefix of `aws` do not count against your tags per resource limit.
Type: Array of [Tag](API_Tag.md) objects  
Array Members: Minimum number of 0 items. Maximum number of 200 items.  
Required: No

## Response Syntax
<a name="API_CreateDatasetGroup_ResponseSyntax"></a>

```
{
   "DatasetGroupArn": "string"
}
```

## Response Elements
<a name="API_CreateDatasetGroup_ResponseElements"></a>

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

 ** [DatasetGroupArn](#API_CreateDatasetGroup_ResponseSyntax) **   <a name="forecast-CreateDatasetGroup-response-DatasetGroupArn"></a>
The Amazon Resource Name (ARN) of the dataset group.  
Type: String  
Length Constraints: Maximum length of 256.  
Pattern: `arn:([a-z\d-]+):forecast:.*:.*:.+` 

## Errors
<a name="API_CreateDatasetGroup_Errors"></a>

 ** InvalidInputException **   
We can't process the request because it includes an invalid value or a value that exceeds the valid range.  
HTTP Status Code: 400

 ** LimitExceededException **   
The limit on the number of resources per account has been exceeded.  
HTTP Status Code: 400

 ** ResourceAlreadyExistsException **   
There is already a resource with this name. Try again with a different name.  
HTTP Status Code: 400

 ** ResourceInUseException **   
The specified resource is in use.  
HTTP Status Code: 400

 ** ResourceNotFoundException **   
We can't find a resource with that Amazon Resource Name (ARN). Check the ARN and try again.  
HTTP Status Code: 400

## See Also
<a name="API_CreateDatasetGroup_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/forecast-2018-06-26/CreateDatasetGroup) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/forecast-2018-06-26/CreateDatasetGroup) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/forecast-2018-06-26/CreateDatasetGroup) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/forecast-2018-06-26/CreateDatasetGroup) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/forecast-2018-06-26/CreateDatasetGroup) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/forecast-2018-06-26/CreateDatasetGroup) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/forecast-2018-06-26/CreateDatasetGroup) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/forecast-2018-06-26/CreateDatasetGroup) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/forecast-2018-06-26/CreateDatasetGroup) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/forecast-2018-06-26/CreateDatasetGroup)