May 2019
Intermediate to advanced
546 pages
12h 41m
English
Content preview from Salesforce Platform Developer I Certification Guide
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Roll-up summary fields
In this section, we'll dive deeper into the use of roll-up summary fields. Let's summarize what we already know about them:
- A roll-up summary field is a type of field only available on a master-detail relationship's parent object.
- It is used to perform a calculation based upon a numeric value of child records.
- A roll-up summary field will grab information from related child object records and perform some calculation with them. Possible calculations are COUNT, SUM, MIN, and MAX.
- It is recalculated whenever you insert, update, or delete one or more of the children, whenever a detailed record is saved to the database.
- You can create up to 25 RUS on a per object basis. This can be increased exceptionally, by submitting ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.