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When to use aggregate function in Salesforce query?
Note that any query that includes an aggregate function returns its results in an array of AggregateResult objects. AggregateResult is a read-only sObject and is only used for query results. Aggregate functions become a more powerful tool to generate reports when you use them with a GROUP BY clause.
When to use aggregate functions in soql apex?
AggregateResult is a read-only sObject and is only used for query results. Aggregate functions become a more powerful tool to generate reports when you use them with a GROUP BY clause. For example, you could find the average Amount for all your opportunities by campaign.
Do you need to call get from aggregateresult?
You need to call get from AggregateResult, not List . Instead of ar.get (‘cnt’), you could for instance do ar [0].get (‘cnt’). ar is of type AggregateResult [] (also known as List ). You are aliasing correctly, but you must call get () on a single AggregateResult.
Can you use an aggregate function without a group by clause?
You can use aggregate functions without using a GROUP BY clause. For example, you could use the AVG () aggregate function to find the average Amount for all your opportunities. Note that any query that includes an aggregate function returns its results in an array of AggregateResult objects.
When do you use aggregateresult in a query?
This object contains the results returned by a query () if the query contains an aggregate function, such as MAX (). AggregateResult is an sObject, but unlike other sObject objects such as Contact, it is read-only and it is only used for query results.
Is there limit on number of aggregate functions?
Queries that include aggregate functions are still subject to the limit on total number of query rows. All aggregate functions other than COUNT () or COUNT (fieldname) include each row used by the aggregation as a query row for the purposes of limit tracking.