SQL Exercises: Higher purchase amount by the customer within a list

SQL Aggregate Functions: Exercise-14 with Solution

From the following table, write a SQL query to find the maximum order (purchase) amount based on the combination of each customer and order date. Filter the rows for maximum order (purchase) amount is either 2000, 3000, 5760, 6000. Return customer id, order date and maximum purchase amount.

Sample table: orders

Sample Solution:

SELECT customer_id,ord_date,MAX(purch_amt) 
FROM orders 
GROUP BY customer_id,ord_date 
HAVING MAX(purch_amt) IN(2000 ,3000,5760, 6000);

Output of the Query:

customer_id	ord_date	max
3002		2012-09-10	5760.00

Code Explanation:

The said SQL query retrieves the customer id, order date, and the maximum purchase amount for each combination of customer id and order date in the 'orders' table.
The result will be grouped by customer id and order date, and only those groups with a maximum purchase amount equal to 2000, 3000, 5760, or 6000 will be returned.
The "HAVING" clause is used to specify the condition for the groups to be returned and the "IN" operator is used to define the set of values that the maximum purchase amount can be.

Explanation :

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