Salesforce Facts by Abhishek

There is a field called 'AccountId' in Task and Event object. This field holds the related AccountId automatically whenever the WhatId is an Id from any of the below objects: Account Opportunity Contract Custom object that is a child of account When the WhoId is a ContactId and WhatId is any other object, in that case it stores the related AccountId of the contact. In all other cases, the AccountId is null. Reference:  https://developer.salesforce.com/docs/atlas.en-us.object_reference.meta/object_reference/sforce_api_objects_task.htm

There is an Sobject called AccountUserTerritory2View which tracks the users present in the assigned territories for a particular account. It basically simulates the 'Users in Assigned Territories' related list. In order to perform SOQL on this Sobject, a filter is required on the AccountId field. Reference:  https://developer.salesforce.com/docs/atlas.en-us.object_reference.meta/object_reference/sforce_api_objects_accountuserterritory2view.htm