https://community.appian.com/discussions/f/general/18982/validation-in-a-gridHow can I add a validation on an input grid to ensure that the data being added does not already exist in the grid ? I&#39;ve a small table in the database, which contains 5 or so fields. field1 is a date field. Within Appian I&#39;ve an interface which has anen-USTelligent Community 12https://community.appian.com/thread/74549?ContentTypeID=1Fri, 05 Jun 2020 10:27:36 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:0cf346c8-7d02-4c26-bfda-ca45351ec0a7pauls0010<p>brilliant &hellip; i&#39;d looked at contains but hadn&#39;t thought about the remove option !</p><div style="clear:both;"></div>https://community.appian.com/thread/74533?ContentTypeID=1Thu, 04 Jun 2020 13:15:49 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:02d1e0f5-3bd6-44d9-a7f6-be26f30968f9Peter Lewis<p>I recently answered a similar question which I think should work for you too - can you take a look at <a href="/discussions/f/rules/18970/how-to-add-validation-in-editable-grid-if-your-using-multiple-updation">this post</a> and see if it answers your question?</p><div style="clear:both;"></div>