Implement Roll-Up Summary Fields
Introduction to Roll-Up Summary Fields
While formula fields calculate values using fields within a single record, roll-up summary fields calculate values from a set of related records, such as those in a related list. You can create roll-up summary fields that automatically display a value on a master record based on the values of records in a detail record. These detail records must be directly related to the master through a master-detail relationship.
- A custom account field that calculates the total of all related pending opportunities.
- A custom order field that sums the unit prices of products that contain a description you specify.
Defining a Roll-Up Summary Field
Since roll-up summary fields are based on master-detail relationships, it’s useful to review object relationships before creating a roll-up summary field.
Master-detail relationships closely link objects together so that the master record controls specific behaviors of the detail and subdetail record.
|COUNT||Totals the number of related records.|
|SUM||Totals the values in the field you select in the Field to Aggregate option. Only number, currency, and percent fields are available.|
|MIN||Displays the lowest value of the field you select in the Field to Aggregate option for all directly related records. Only number, currency, percent, date, and date/time fields are available.|
|MAX||Displays the highest value of the field you select in the Field to Aggregate option for all directly related records. Only number, currency, percent, date, and date/time fields are available.|
Creating the Summary Field
- From Setup, open Object Manager and click Account.
- On the left sidebar, click Fields & Relationships.
- Click New.
- Choose the Roll-Up Summary field type, and click Next.
- For Field Label, enter Sum of Opportunities and click Next.
- The Summarized Object is the detail object that you want to summarize. Choose Opportunities.
- Choose the SUM summary type and choose Amount as the Field to Aggregate.
- Click Next, Next, and Save.
Examples of Roll-Up Summary Fields
Here are more examples of detail data rolling up to master records.
Date Opportunity First Created
Total Price of All Products Related to an Opportunity
Minimum List Price of An Opportunity
A roll-up field was created on the Opportunities object. List Price is summarized on the Opportunity Product object to find the product with the lowest price related to an opportunity.
Tell Me More
- Number, currency, and percent fields are available when you select SUM as the roll-up type.
- Number, currency, percent, date, and date/time fields are available when you select MIN or MAX as the roll-up type.