https://community.appian.com/discussions/f/general/11307/updating-database-with-a-webservice-but-can-i-choose-to-not-update-a-specific-fieldHello, I was wondering if it was possible to do the following: I have a webservice in a process model that pulls data and then saves it to the mySQL database. Lets say the the first time the process model runs, it inserts this data in to the mySQLen-USTelligent Community 12https://community.appian.com/thread/49723?ContentTypeID=1Fri, 27 Oct 2017 19:37:27 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:709c1426-d44c-4663-9996-d5ad3aa5aea2JoshIf your dataset is relatively small you can follow puspendup403&#39;s suggestion of pulling in the CDT&#39;s from the database and selectively updating certain fields if the data already exists. If you dataset is rather large I would recommend writing a stored procedure to handle the &quot;if exists&quot; logic and calling the stored procedure from Appian.<div style="clear:both;"></div>https://community.appian.com/thread/49722?ContentTypeID=1Fri, 27 Oct 2017 19:18:23 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:2a3f420d-c13c-424b-820a-fbc1b2af439aPuspendu Pal<p>Hello,<br /> <br /> Cant you pull the value of the address from the DB and update the new address value in the CDT with the old value and then update the whole CDT into the DB?</p><div style="clear:both;"></div>