SQL Subquery Exercises: Find the salesmen who have multiple customers
SQL SUBQUERY: Exercise-16 with Solution
16. Write a query to find the salesmen who have multiple customers.
Sample table: Customer
Sample table: Salesman
SELECT * FROM salesman WHERE salesman_id IN ( SELECT DISTINCT salesman_id FROM customer a WHERE EXISTS ( SELECT * FROM customer b WHERE b.salesman_id=a.salesman_id AND b.cust_name<>a.cust_name));
salesman_id name city commission 5001 James Hoog New York 0.15 5002 Nail Knite Paris 0.13
Contribute your code and comments through Disqus.
Previous: Write a query to extract the data from the customer table if and only if one or more of the customers in the customer table are located in London.
Next: Write a query to find all the salesmen who worked for only one customer.
What is the difficulty level of this exercise?