SQL Exercise: Using NOT, OR & AND operators

SQL Boolean Operator Statement: Exercise-9 with Solution.

From the following table, write a SQL query to find all orders that meet the following conditions. Exclude combinations of order date equal to '2012-08-17' or customer ID greater than 3005 and purchase amount less than 1000.

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 :

-- This query selects all columns from the 'orders' table.
SELECT *
-- Specifies the table from which to retrieve the data (in this case, 'orders').
FROM orders
-- Filters the rows to only include those where the conditions inside the parentheses following 'NOT' are not true.
WHERE NOT ((ord_date = '2012-08-17' OR customer_id > 3005) AND purch_amt < 1000);

Output of the Query:

ord_no	purch_amt	ord_date	customer_id	salesman_id
70009	270.65		2012-09-10	3001		5005
70002	65.26		2012-10-05	3002		5001
70005	2400.60		2012-07-27	3007		5001
70008	5760.00		2012-09-10	3002		5001
70010	1983.43		2012-10-10	3004		5006
70003	2480.40		2012-10-10	3009		5003
70013	3045.60		2012-04-25	3002		5001
70001	150.50		2012-10-05	3005		5002
70007	948.50		2012-09-10	3005		5002

Code Explanation:

The SQL query that is selecting all columns (*) from the ‘orders’ table where NOT(( the value of the "ord_date" column is '2012-08-17' OR the value of the "customer_id" column is greater than 3005) AND the value of the "purch_amt" column is less than 1000).
The query will return all rows from the ‘orders’ table that do not meet any of these conditions.
It will return all the rows where ord_date is not '2012-08-17' or customer_id is less than or equal to 3005 and purchase amount is greater or equal to 1000.

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