Can GROUP BY have aggregate function?

Question

The GROUP BY statement groups rows that have the same values into summary rows, like "find the number of customers in each country". The GROUP BY statement is often used with aggregate functions ( COUNT() , MAX() , MIN() , SUM() , AVG() ) to group the result-set by one or more columns.

Is GROUP BY an aggregate function in SQL?

What Is Group By in SQL? The Group By statement is used to group together any rows of a column with the same value stored in them, based on a function specified in the statement. Generally, these functions are one of the aggregate functions such as MAX() and SUM(). This statement is used with the SELECT command in SQL.

Does GROUP BY works without aggregate function?

You can use the GROUP BY clause without applying an aggregate function.

Can we use aggregate function with GROUP BY clause in mysql?

The GROUP BY clause is often used with an aggregate function to perform calculations and return a single value for each subgroup.

Can ORDER BY have aggregate function?

An aggregate function cannot be used directly in: an ORDER BY clause. Attempting to do so generates an SQLCODE -73 error. However, you can use an aggregate function in an ORDER BY clause by specifying the corresponding column alias or selectItem sequence number.

Expert · Answer