https://community.appian.com/discussions/f/general/12136/how-to-create-an-xsd-file-with-no-primary-keyI know that the old database connectivity node is being deprecated. I am trying to query a database by way of creating a query rule. I created a data type but the table I will be connecting to has no primary key. I find myself at a lost when I createen-USTelligent Community 12https://community.appian.com/thread/53732?ContentTypeID=1Wed, 28 Mar 2018 20:16:05 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:750e2d84-3f59-434d-a274-a0fbaf76cb7drameshkAFAIK, There should be a primary key in the table when you map the CDT. <br /> I think you already know that Appian would create a_id by default if table doesnt have a primay key. The alternate solution would be create a view (copy of the table) and map the CDT to the view.<div style="clear:both;"></div>