SQL Exercises: View to show the salesmen issued orders on given date

Last update on January 12 2026 12:48:22 (UTC/GMT +8 hours)

15. From the following table, create a view to find the salespeople who placed orders on October 10th, 2012. Return all the fields of salesperson.

Sample table: Salesman

 salesman_id |    name    |   city   | commission 
-------------+------------+----------+------------
        5001 | James Hoog | New York |       0.15
        5002 | Nail Knite | Paris    |       0.13
        5005 | Pit Alex   | London   |       0.11
        5006 | Mc Lyon    | Paris    |       0.14
        5007 | Paul Adam  | Rome     |       0.13
        5003 | Lauson Hen | San Jose |       0.12

Sample table: orders

ord_no      purch_amt   ord_date    customer_id  salesman_id
----------  ----------  ----------  -----------  -----------
70001       150.5       2012-10-05  3005         5002
70009       270.65      2012-09-10  3001         5005
70002       65.26       2012-10-05  3002         5001
70004       110.5       2012-08-17  3009         5003
70007       948.5       2012-09-10  3005         5002
70005       2400.6      2012-07-27  3007         5001
70008       5760        2012-09-10  3002         5001
70010       1983.43     2012-10-10  3004         5006
70003       2480.4      2012-10-10  3009         5003
70012       250.45      2012-06-27  3008         5002
70011       75.29       2012-08-17  3003         5007
70013       3045.6      2012-04-25  3002         5001

Sample Solution:

-- Creating a VIEW named 'salesmanonoct' with all columns from the 'salesman' table
CREATE VIEW salesmanonoct

-- Selecting rows from the 'salesman' table where the 'salesman_id' is present in the result of the subquery
-- The subquery selects 'salesman_id' from the 'orders' table where 'ord_date' is '2012-10-10'
AS SELECT *
FROM salesman
WHERE salesman_id IN
    (SELECT salesman_id
         FROM orders
         WHERE ord_date = '2012-10-10');

output:

sqlpractice=# SELECT *
sqlpractice-# FROM salesmanonoct;
 salesman_id |     name     | city  | commission
-------------+--------------+-------+------------
        5006 | Mc Lyon      | Paris |       0.14
        5003 | Lauson Hense |       |       0.12
(2 rows)

Code Explanation:

The provided statement in SQL creates a new view called salesmanonoct that selects all columns from the salesman table, but only for those salesmen who had orders on October 10th, 2012.
This WHERE clause filters the results by a subquery which selects only those rows where the salesman_id column matches a value that is also found in the salesman_id column of the orders table where the ord_date column equals '2012-10-10'.

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Inventory database model:

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