https://community.appian.com/discussions/f/rules/7319/what-jpa-annotation-in-my-xsd-should-be-used-to-reference-a-compound-key-in-a-taWhat JPA annotation in my XSD should be used to reference a compound key in a table. I have a table that was previously created and the primary key consist of two columns. OriginalPostID-203808 OriginalPostID-203808en-USTelligent Community 12https://community.appian.com/thread/64851?ContentTypeID=1Mon, 25 Feb 2019 23:59:22 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:67a4584a-58c5-4f2f-b2ac-ed02f8ae0063Mathieu DrouinHi rudrakshakammarig <br /> <br /> Perhaps this can help: <a href="https://docs.appian.com/suite/help/19.1/Database_Schema_Best_Practices.html#composite-keys">docs.appian.com/.../Database_Schema_Best_Practices.html</a><div style="clear:both;"></div>https://community.appian.com/thread/64846?ContentTypeID=1Mon, 25 Feb 2019 15:44:25 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:af3eb9ed-e6df-4f33-b53c-6b4250cd3a8fmjmalletI think this would be the post I am referring too. (but it&#39;s been a while)<br /> <a href="https://community.appian.com/discussions/f/general/7257/hi-i-am-trying-to-map-a-composite-key-from-a-different-cdt-to-another-one/29360#29360">community.appian.com/.../29360</a><div style="clear:both;"></div>https://community.appian.com/thread/64845?ContentTypeID=1Mon, 25 Feb 2019 15:16:38 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:e14596df-a90f-4536-8323-a5343dd5e2bbrudrakshakammarighi <a href="/members/mjmallet">mjmallet</a> ,<br /> can you share the answer or the post?<br /> thanks<div style="clear:both;"></div>https://community.appian.com/thread/29689?ContentTypeID=1Fri, 01 Apr 2016 01:12:42 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:e88ac043-c0c0-4785-9e9d-88bf5f17bfc5mjmalletGot my answer.. I was searching for compound but found another post from last week about composite key.<div style="clear:both;"></div>