Is there an aggregate function in apex soql?

Is there an aggregate function in apex soql?

Since aggregate function does not work on the Standard ActivityDate field on Tasks, I created a custom field ActivityDate__c to return the most recent activity entered. However, my code below keeps getting the following error “only root queries support aggregate expressions”. Can anyone assist? You were close!

How does limit count work in soql aggregate function?

For COUNT () or COUNT (fieldname) queries, limits are counted as one query row, unless the query contains a GROUP BY clause, in which case one query row per grouping is consumed. Sorry, the document you are looking for doesn’t exist or could not be retrieved.

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.

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.

Which is an example of string agg in SQL?

STRING_AGG is available in any compatibility level. Examples A. Generate list of names separated in new lines. The following example produces a list of names in a single result cell, separated with carriage returns. USE AdventureWorks2016 GO SELECT STRING_AGG (CONVERT(NVARCHAR(max),FirstName), CHAR(13)) AS csv FROM Person.Person;

Where does the separator go in string _ agg?

STRING_AGG (Transact-SQL) Concatenates the values of string expressions and places separator values between them. The separator is not added at the end of string.