How to upsert records using Workbench. Learn about the Power of Upsert and External IDs in this presentation based on my blog post series: https://douglascayers.wordpress.com/2016/02/07/salesforce-power-of-upsert-and-external-ids-part-1/ https://douglascayers.wordpress.com/2016/02/07/salesforce-power-of-upsert-and-external-ids-part-2/