Top SQL Questions

Kevin Ashley

Find the customer with the most orders.

This technical problem involves finding the customer with the most orders in a given table. The table consists of customer order information, including customer id, order date, etc. The goal is to write a SQL query to identify the customer with the most orders.

Problem

Given a table of customer orders, write a SQL query to find the customer with the most orders.
Input:
CustomerOrder
id customer_id order_date
1 1 2019-01-01
2 2 2019-01-02
3 1 2019-01-03
4 3 2019-01-04
Output:
1

Solution

This solution is in SQL. Our A.I. can create solutions in multiple languages.
by AskAI 
SELECT * FROM CustomerOrder
A.I. Evaluation of the Solution

The candidate's solution does not demonstrate a level of completeness and does not solve the problem. The candidate's approach is to simply select all data from the customer orders table. This does not provide any information on which customer has the most orders. To solve the problem, the candidate would need to provide a GROUP BY clause to group customer orders by customer ID, and then use a COUNT function to count the number of orders for each customer.

Evaluated at: 2022-11-02 16:10:36