What happens if you omit the GROUP BY clause in a SQL query with aggregate functions?a.The query returns the aggregate result for the entire tableb.The query returns an errorc.The query returns only the first row of the result setd.The query groups all rows into a single group

The answer is a. The query returns the aggregate result for the entire table.

Here's why:

In SQL, aggregate functions like COUNT(), SUM(), AVG(), MAX(), or MIN() operate on a set of values and return a single value. When you use an aggregate function without a GROUP BY clause, it aggregates over the entire result set (i.e., all the rows that meet the query conditions), and returns a single value.

For example, if you have a table of sales data and you run a query with the aggregate function SUM() on the 'sales' column without a GROUP BY clause, the query will return the total sales for all rows in the table.

If you include a GROUP BY clause, the aggregate function will instead return a separate result for each unique value in the column(s) you're grouping by. For example, if you group by the 'region' column in your sales data table, the query will return the total sales for each unique region.

So, if you omit the GROUP BY clause in a SQL query with aggregate functions, the query returns the aggregate result for the entire table.