How to upsert records using External Id in Salesforce REST API?
We can upsert(Insert/Update) records using External Id field in Salesforce. 1. Use the following link to setup Connected App to get Access Token. https://www.infallibletechie.com/2024/01/salesforce-oauth-2-0-client-credentials-flow-to-get-access-token.html 2. We can do a PATCH ....