w3resource

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.

Relational Algebra Expression:

Relational Algebra Expression: Find customer details (within a specific range) and purchase amount more than a specific amount.

Relational Algebra Tree:

Relational Algebra Tree: Find customer details (within a specific range) and purchase amount more than a specific amount.

Explanation:

Syntax of display customer details with specified range

Visual presentation :

Result of display customer details with specified range

Practice Online


Query Visualization:

Duration:

Query visualization of Find customer details (within a specific range) and purchase amount more than a specific amount - Duration

Rows:

Query visualization of Find customer details (within a specific range) and purchase amount more than a specific amount - Rows

Cost:

Query visualization of Find customer details (within a specific range) and purchase amount more than a specific amount - Cost

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous SQL Exercise: Highest purchase amount from customers.
Next SQL Exercise: Customer with the highest purchase amount.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.

SQL: Tips of the Day

What is the best way to paginate results in SQL Server?

SELECT  *
FROM    ( SELECT    ROW_NUMBER() OVER ( ORDER BY OrderDate ) AS RowNum, *
          FROM      Orders
          WHERE     OrderDate >= '1980-01-01'
        ) AS RowConstrainedResult
WHERE   RowNum >= 1
    AND RowNum < 20
ORDER BY RowNum

Database: SQL Server

Ref: https://bit.ly/3MGrNlk

 





We are closing our Disqus commenting system for some maintenanace issues. You may write to us at reach[at]yahoo[dot]com or visit us at Facebook