Add Column to a Data Extension

To capture additional information in an existing data extension, add a column to it.

Sample SOAP Envelope

1<s:Envelope
2  xmlns:s="http://www.w3.org/2003/05/soap-envelope"
3  xmlns:a="http://schemas.xmlsoap.org/ws/2004/08/addressing"
4  xmlns:u="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
5  <s:Header>
6    <a:Action s:mustUnderstand="1">Update</a:Action>
7    <a:To s:mustUnderstand="1">https://YOUR_SUBDOMAIN.soap.marketingcloudapis.com/Service.asmx</a:To>
8    <fueloauth xmlns="http://exacttarget.com">YOUR_ACCESS_TOKEN</fueloauth>
9  </s:Header>
10  <s:Body
11    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
12    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
13    <UpdateRequest xmlns="http://exacttarget.com/wsdl/partnerAPI">
14      <Options></Options>
15      <Objects xsi:type="DataExtension">
16        <CustomerKey>b9bdce33-b849-4298-a288-462535f8e145</CustomerKey>
17        <Fields>
18          <Field>
19            <Name>New Field</Name>
20            <MaxLength>200</MaxLength>
21            <IsRequired>true</IsRequired>
22          </Field>
23        </Fields>
24      </Objects>
25    </UpdateRequest>
26  </s:Body>
27</s:Envelope>