SQL Exercises: Prepare a list for the salesmen who either work for one or more customers or yet to join any of the customers. The customer, may have placed, either one or more orders on or above order amount 2000 and must have a grade, or he may not have placed any order to the associated supplier

SQL JOINS: Exercise-14 with Solution

Write a SQL statement to make a list for the salesmen who either work for one or more customers or yet to join any of the customer. The customer, may have placed, either one or more orders on or above order amount 2000 and must have a grade, or he may not have placed any order to the associated supplier.

Sample table: customer

Sample table: salesman

Sample table: orders

Sample Solution:

SELECT a.cust_name,a.city,a.grade, 
b.name AS "Salesman", 
c.ord_no, c.ord_date, c.purch_amt 
FROM customer a 
RIGHT OUTER JOIN salesman b 
ON b.salesman_id=a.salesman_id 
LEFT OUTER JOIN orders c 
ON c.customer_id=a.customer_id 
WHERE c.purch_amt>=2000 
AND a.grade IS NOT NULL;

Output of the Query:

cust_name     |city      |grade|Salesman  |ord_no|ord_date  |purch_amt|
--------------|----------|-----|----------|------|----------|---------|
Nick Rimando  |New York  |  100|James Hoog| 70002|2012-10-05|    65.26|
Geoff Cameron |Berlin    |  100|Lauson Hen| 70004|2012-08-17|   110.50|
Brad Davis    |New York  |  200|James Hoog| 70005|2012-07-27|  2400.60|
Nick Rimando  |New York  |  100|James Hoog| 70008|2012-09-10|  5760.00|
Fabian Johnson|Paris     |  300|Mc Lyon   | 70010|2012-10-10|  1983.43|
Geoff Cameron |Berlin    |  100|Lauson Hen| 70003|2012-10-10|  2480.40|
Jozy Altidor  |Moscow    |  200|Paul Adam | 70011|2012-08-17|    75.29|
Nick Rimando  |New York  |  100|James Hoog| 70013|2012-04-25|  3045.60|
Graham Zusi   |California|  200|Nail Knite| 70001|2012-10-05|   150.50|
Graham Zusi   |California|  200|Nail Knite| 70007|2012-09-10|   948.50|
Julian Green  |London    |  300|Nail Knite| 70012|2012-06-27|   250.45|

Explanation:

Pictorial presentation:

Practice Online

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

Previous: From the following tables write a SQL query to list all salespersons along with customer name, city, grade, order number, date, and amount.
Next: Write a SQL statement to make a report with customer name, city, order no. order date, purchase amount for those customers from the existing list who placed one or more orders or which order(s) have been placed by the customer who is not on the list