Q:

From the following tables, write a SQL query to find those salespersons who generated the largest and smallest orders on each date

hamza
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2022-05-18
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 From the following tables, write a SQL query to find those salespersons who generated the largest and smallest orders on each date. Sort the result-set on 3rd field. Return salesperson ID, name, order no., highest on/lowest on, order date.

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
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
Sql programming,
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hamza
2022-05-18
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SELECT a.salesman_id, name, ord_no, 'highest on', ord_date
FROM salesman a, orders b
WHERE a.salesman_id =b.salesman_id
AND b.purch_amt=
	(SELECT MAX (purch_amt)
	FROM orders c
	WHERE c.ord_date = b.ord_date)
UNION
(SELECT a.salesman_id, name, ord_no, 'lowest on', ord_date
FROM salesman a, orders b
WHERE a.salesman_id =b.salesman_id
AND b.purch_amt=
	(SELECT MIN (purch_amt)
	FROM orders c
	WHERE c.ord_date = b.ord_date))
ORDER BY 3

Sample Output:

salesman_id	name		ord_no	?column?	ord_date
5002		Nail Knite	70001	highest on	2012-10-05
5001		James Hoog	70002	lowest on	2012-10-05
5003		Lauson Hen	70003	highest on	2012-10-10
5003		Lauson Hen	70004	highest on	2012-08-17
5001		James Hoog	70005	lowest on	2012-07-27
5001		James Hoog	70005	highest on	2012-07-27
5001		James Hoog	70008	highest on	2012-09-10
5005		Pit Alex	70009	lowest on	2012-09-10
5006		Mc Lyon		70010	lowest on	2012-10-10
5007		Paul Adam	70011	lowest on	2012-08-17
5002		Nail Knite	70012	lowest on	2012-06-27
5002		Nail Knite	70012	highest on	2012-06-27
5001		James Hoog	70013	lowest on	2012-04-25
5001		James Hoog	70013	highest on	2012-04-25

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