[Salesforce] The Sobject Crusade: ActivityHistory

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Source: ActivityHistory

The ActivityHistory object is a read-only object that shows all completed Tasks and past Events related to a give object (e.g. Account). It includes activities for all contacts related to the object.

This object is shown in the Activity History related list:

Few limitations apply:

• The object cannot be queried directly but only queried through inner query (e.g. Select Id, (Select Subject From ActivityHistory) From Account Where Name = 'ACME bros')
• Your main query must reference exactly 1 record
• Inner query must not have a WHERE clause
• Inner query must filter a maximum of 500 items

Here is an example query:

SELECT Name, (SELECT ActivityDate, Subject, IsTask FROM ActivityHistories ORDER BY ActivityDate ASC NULLS LAST Limit 500) FROM Account WHERE Name ='ACME Bros'