https://community.appian.com/discussions/f/general/8832/composite-keyHow to reuse the database generated record(row id) keys [not generated using @Id annotation] to delete/write the database records along with composited keys? Especially when using with The Write to Data Store Entity and Delete from Data Store Entitiesen-USTelligent Community 12https://community.appian.com/thread/39258?ContentTypeID=1Fri, 11 Nov 2016 16:45:00 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:e08228bd-b415-4989-9a28-79b72d9848acChristineLHutchison@id is used to identify which single field is the &quot;primary&quot;. It can point to a column that already exists in an existing table. <br />If you search composite, you will find many posts that talk about alternates and handling of composite keys.<div style="clear:both;"></div>