Create SQL Exercises: Find the highest purchase amount of the customers in a particular date

Author: mrmightyq

w3resource/SQL Exercises: Find the highest purchase amount of the customers in a particular date

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+https://www.w3resource.com/sql-exercises/sql-aggregate-function-exercise-12.php
+
+SQL Aggregate Functions: Exercise-12 with Solution
+From the following table, write a SQL query to find highest order (purchase) amount by each customer in a particular order date. Filter the result by highest order (purchase) amount above 2000.00. Return customer id, order date and maximum purchase amount.
+
+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
+
+
+select customer_id, ord_date,max(purch_amt)  
+from orders
+group by customer_id,ord_date
+having max(purch_amt) > 20000
+;