From the following tables, create a view to find the salesperson who handles a customer who makes the highest order of a day

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From the following tables, create a view to find the salesperson who handles a customer who makes the highest order of a day. Return order date, salesperson ID, name.

Sample table: customer

customer_id |   cust_name    |    city    | grade | salesman_id 
-------------+----------------+------------+-------+-------------
        3002 | Nick Rimando   | New York   |   100 |        5001
        3007 | Brad Davis     | New York   |   200 |        5001
        3005 | Graham Zusi    | California |   200 |        5002
        3008 | Julian Green   | London     |   300 |        5002
        3004 | Fabian Johnson | Paris      |   300 |        5006
        3009 | Geoff Cameron  | Berlin     |   100 |        5003
        3003 | Jozy Altidor   | Moscow     |   200 |        5007
        3001 | Brad Guzan     | London     |       |        5005
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

الأجوبة

CREATE VIEW elitsalesman
AS SELECT b.ord_date, a.salesman_id, a.name
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);

output:

sqlpractice=# SELECT *
sqlpractice-# FROM elitsalesman;
  ord_date  | salesman_id |     name
------------+-------------+--------------
 2012-08-17 |        5003 | Lauson Hense
 2012-07-27 |        5001 | James Hoog 
 2012-09-10 |        5001 | James Hoog 
 2012-10-10 |        5003 | Lauson Hense
 2012-06-27 |        5002 | Nail Knite
 2012-04-25 |        5001 | James Hoog 
 2012-10-05 |        5002 | Nail Knite
 2012-09-22 |        5006 | Mc Lyon
(8 rows)
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أسئلة مشابهة

From the following tables, create a view to get the salesperson and customer by name
From the following tables, write a SQL query to find those customers where each customer has a grade and served by at least a salesperson
From the following tables write a SQL query to list all salespersons along with customer name, city, grade, order number, date, and amount
Write a SQL statement to make a report with customer name, city, order number, order date, order amount salesman name and commission

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