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SQL exercises

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	70013	2012-04-25	3045.60
Nick Rimando	New York	100	James Hoog	70008	2012-09-10	5760.00
Brad Davis	New York	200	James Hoog	70005	2012-07-27	2400.60
Geoff Cameron	Berlin		100	Lauson Hen	70003	2012-10-10	2480.40

Explanation :

Syntax of a list for the salesmen who either work for one or more customer or yet to join any of the customer

Pictorial presentation:

Result of a list for the salesmen who either work for one or more customer or yet to join any of the customer
Result of a list for the salesmen who either work for one or more customer or yet to join any of the customer

Query Visualization:

Duration:

Query visualization of 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 - Duration

Rows:

Query visualization of 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 - Rows

Cost:

Query visualization of 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 - Cost

 

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Previous: Write a SQL statement to make a list for the salesmen who works either for one or more customer or not yet join under any of the customers who placed either one or more orders or no order to their supplier.
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

What is the difficulty level of this exercise?



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