SQL Exercises: Customer details and purchases over a certain amount

SQL Aggregate Functions: Exercise-16 with Solution

From the following table, write a SQL query to find the maximum order (purchase) amount for each customer. The customer ID should be in the range 3002 and 3007(Begin and end values are included.).Filter the rows for maximum order (purchase) amount is higher than 1000. Return customer id and maximum purchase amount.

Sample table: orders

Sample Solution:

SELECT customer_id,MAX(purch_amt) 
FROM orders 
WHERE customer_id BETWEEN 3002 and 3007 
GROUP BY customer_id 
HAVING MAX(purch_amt)>1000;

Output of the Query:

customer_id	max
3002		5760.00
3007		2400.60
3004		1983.43

Code Explanation:

The given SQL query will retrieve the customer_id as well as the maximum purchase amount (purch_amt) for customers with an ID between 3002 and 3007, but this will only work if the maximum purchase amount exceeds 1000 from the 'orders' table.
The "HAVING" clause filters the result set by only showing customers whose maximum purchase amount is greater than 1000. The result will show the maximum purchase amount made by each customer in the specified range, with the customer_id being grouped together.

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