Roll-Up Summary Fields

Roll-Up Summary Fields in Salesforce summarize data from a set of related detail records and automatically display the output on the master record. These can be used to display the sum, maximum, minimum value of a field in a related list, also the count of all the records listed in a related list. They are only available to master objects in a master-detail relationship.

After creating a Roll Up Summary Field on an object, the master-detail relationship cannot be converted into a lookup relationship.

Moving forward, let us now learn about Fields.