How can MySQL utilize the GROUP BY and HAVING clauses?

In MySQL, you can use the GROUP BY clause to group the query results and then use the HAVING clause to filter the grouped results. Here is an example of using the GROUP BY and HAVING clauses:

Assuming there is a table called “orders” that includes information on orders and order amounts.

1. Query the number of orders with an order amount greater than 1000 using the GROUP BY and HAVING clauses.

SELECT COUNT(*) as order_count
FROM orders
GROUP BY order_id
HAVING SUM(order_amount) > 1000;

1. Retrieve users and their total order amounts for users whose total order amount is greater than 2000 using the GROUP BY and HAVING clauses.

SELECT user_id, SUM(order_amount) as total_amount
FROM orders
GROUP BY user_id
HAVING total_amount > 2000;

In the examples mentioned above, the GROUP BY clause groups the results of a query based on specified fields, while the HAVING clause filters the grouped results. By using these two clauses together, the query results can be grouped and filtered more effectively.