w3resource

SQL Exercise: Arrange the orders according to the order date

SQL Formatting Output: Exercise-4 with Solution

From the following table, write a SQL query to find all the orders. Sort the result-set in descending order by ord_date. Return all fields.

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 and orders the result set by the 'ord_date' column in descending order.
SELECT *
-- Specifies the table from which to retrieve the data (in this case, 'orders').
FROM orders
-- Orders the result set by the 'ord_date' column in descending order.
ORDER BY ord_date DESC;

Output of the Query:

ord_no	purch_amt	ord_date	customer_id	salesman_id
70010	1983.43		2012-10-10	3004		5006
70003	2480.40		2012-10-10	3009		5003
70002	65.26		2012-10-05	3002		5001
70001	150.50		2012-10-05	3005		5002
70009	270.65		2012-09-10	3001		5005
70008	5760.00		2012-09-10	3002		5001
70007	948.50		2012-09-10	3005		5002
70011	75.29		2012-08-17	3003		5007
70004	110.50		2012-08-17	3009		5003
70005	2400.60		2012-07-27	3007		5001
70012	250.45		2012-06-27	3008		5002
70013	3045.60		2012-04-25	3002		5001

Code Explanation:

The said SQL query retrieves all columns from the 'orders' table and returns the result sorted in descending order based on the "ord_date" column. The "ORDER BY ord_date DESC" clause sorts the rows in the result set based on the values in the ord_date column in descending order.

Relational Algebra Expression:

Relational Algebra Expression: Arrange the orders according to the order date (latest  will come first then previous).

Relational Algebra Tree:

Relational Algebra Tree: Arrange the orders according to the order date (latest  will come first then previous).

Explanation :

Syntax of arrange the orders according to the order_date in such a manner that the latest date will come first then previous dates

Visual presentation :

Result of arrange the orders according to the order_date in such a manner that the latest date will come first then previous dates

Practice Online


Query Visualization:

Duration:

Query visualization of Arrange the orders according to the order date (latest will come first then previous) - Duration

Rows:

Query visualization of Arrange the orders according to the order date (latest will come first then previous) - Rows

Cost:

Query visualization of Arrange the orders according to the order date (latest will come first then previous) - Cost

 

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous SQL Exercise: Display orders after sorting orders by order number.
Next SQL Exercise: Oldest orders first on the highest purchase amount.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.