# CreateDBSubnetGroup
<a name="API_CreateDBSubnetGroup"></a>

Creates a new DB subnet group. DB subnet groups must contain at least one subnet in at least two AZs in the Amazon Web Services Region.

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

 For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

 ** DBSubnetGroupDescription **   
The description for the DB subnet group.  
Type: String  
Required: Yes

 ** DBSubnetGroupName **   
The name for the DB subnet group. This value is stored as a lowercase string.  
Constraints:  
+ Must contain no more than 255 letters, numbers, periods, underscores, spaces, or hyphens.
+ Must not be default.
+ First character must be a letter.
Example: `mydbsubnetgroup`   
Type: String  
Required: Yes

 **SubnetIds.SubnetIdentifier.N**   
The EC2 Subnet IDs for the DB subnet group.  
Type: Array of strings  
Required: Yes

 **Tags.Tag.N**   
Tags to assign to the DB subnet group.  
Type: Array of [Tag](API_Tag.md) objects  
Required: No

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

The following element is returned by the service.

 ** DBSubnetGroup **   
Contains the details of an Amazon RDS DB subnet group.  
This data type is used as a response element in the `DescribeDBSubnetGroups` action.  
Type: [DBSubnetGroup](API_DBSubnetGroup.md) object

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

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** DBSubnetGroupAlreadyExists **   
 `DBSubnetGroupName` is already used by an existing DB subnet group.  
HTTP Status Code: 400

 ** DBSubnetGroupDoesNotCoverEnoughAZs **   
Subnets in the DB subnet group should cover at least two Availability Zones unless there is only one Availability Zone.  
HTTP Status Code: 400

 ** DBSubnetGroupQuotaExceeded **   
The request would result in the user exceeding the allowed number of DB subnet groups.  
HTTP Status Code: 400

 ** DBSubnetQuotaExceededFault **   
The request would result in the user exceeding the allowed number of subnets in a DB subnet groups.  
HTTP Status Code: 400

 ** InvalidSubnet **   
The requested subnet is invalid, or multiple subnets were requested that are not all in a common VPC.  
HTTP Status Code: 400

## Examples
<a name="API_CreateDBSubnetGroup_Examples"></a>

### Example
<a name="API_CreateDBSubnetGroup_Example_1"></a>

This example illustrates one usage of CreateDBSubnetGroup.

#### Sample Request
<a name="API_CreateDBSubnetGroup_Example_1_Request"></a>

```
https://rds.us-east-1.amazonaws.com/
   ?Action=CreateDBSubnetGroup
   &DBSubnetGroupDescription=My%20new%20DB%20Subnet%20Group
   &DBSubnetGroupName=myawsuser-dbsubnetgroup
   &SignatureMethod=HmacSHA256
   &SignatureVersion=4
   &SubnetIds.member.1=subnet-e4d398a1
   &SubnetIds.member.2=subnet-c2bdb6ba
   &Version=2014-10-31
   &X-Amz-Algorithm=AWS4-HMAC-SHA256
   &X-Amz-Credential=AKIADQKE4SARGYLE/20140425/us-east-1/rds/aws4_request
   &X-Amz-Date=20140425T173028Z
   &X-Amz-SignedHeaders=content-type;host;user-agent;x-amz-content-sha256;x-amz-date
   &X-Amz-Signature=f434cd02a766ea034637debf67996a743ca3e098efc9a5881c61e0c6859259d3
```

#### Sample Response
<a name="API_CreateDBSubnetGroup_Example_1_Response"></a>

```
<CreateDBSubnetGroupResponse xmlns="http://rds.amazonaws.com/doc/2014-10-31/">
  <CreateDBSubnetGroupResult>
    <DBSubnetGroup>
      <VpcId>vpc-33dc97ea</VpcId>
      <SubnetGroupStatus>Complete</SubnetGroupStatus>
      <DBSubnetGroupDescription>My new DB subnet group</DBSubnetGroupDescription>
      <DBSubnetGroupName>myawsuser-dbsubnetgroup</DBSubnetGroupName>
      <Subnets>
        <Subnet>
          <SubnetStatus>Active</SubnetStatus>
          <SubnetIdentifier>subnet-e4d398a1</SubnetIdentifier>
          <SubnetAvailabilityZone>
            <Name>us-east-1b</Name>
            <ProvisionedIopsCapable>false</ProvisionedIopsCapable>
          </SubnetAvailabilityZone>
        </Subnet>
        <Subnet>
          <SubnetStatus>Active</SubnetStatus>
          <SubnetIdentifier>subnet-c2bdb6ba</SubnetIdentifier>
          <SubnetAvailabilityZone>
            <Name>us-east-1c</Name>
            <ProvisionedIopsCapable>false</ProvisionedIopsCapable>
          </SubnetAvailabilityZone>
        </Subnet>
      </Subnets>
    </DBSubnetGroup>
  </CreateDBSubnetGroupResult>
  <ResponseMetadata>
    <RequestId>3a401b3f-bb9e-11d3-f4c6-37db295f7674</RequestId>
  </ResponseMetadata>
</CreateDBSubnetGroupResponse>
```

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

For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/rds-2014-10-31/CreateDBSubnetGroup) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/rds-2014-10-31/CreateDBSubnetGroup) 
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/rds-2014-10-31/CreateDBSubnetGroup) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/rds-2014-10-31/CreateDBSubnetGroup) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/rds-2014-10-31/CreateDBSubnetGroup) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/rds-2014-10-31/CreateDBSubnetGroup) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/rds-2014-10-31/CreateDBSubnetGroup) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/rds-2014-10-31/CreateDBSubnetGroup) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/rds-2014-10-31/CreateDBSubnetGroup) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/rds-2014-10-31/CreateDBSubnetGroup)