Fetch XML is a really handy way of retrieving data from CRM. It is easy to construct complex query and really simple to execute. In this blog article I will explain how you can execute fetch XML query in Dynamic CRM 2011 or CRM online. To start you will first need to download a fetch xml from advanced find and then use the RetrieveMultiple method of the CRM Service to execute the Fetch XML.
First go to Advanced d find and select the entity on which you need to make query