Specific date with current_month and previous_month - mysql

Question

Is it possible to make the year and month part of the date dynamic (based on current year and month) instead of hard coded?
SELECT SUM(`amount`)
FROM employees
WHERE (`date` between "2018-08-26" and "2018-09-26") AND `status` = 'Pending';
In the above example, if the current month is 9 then the query should be 08-26 and 09-26, if the current month is 10 then 09-26 and 10-26 and so on.

Answer 1

If you want to query data for last month, it's enough to use such query:
SELECT * FROM my_table
WHERE some_datetime_column > DATE_ADD(NOW(), INTERVAL -1 MONTH);
Also, if you want to get current month/year, try this:
SELECT MONTH(NOW()), YEAR(NOW())
Demo
UPDATE
Try this:
--here you specify the day of the month you want
SELECT #days := 26 - DAY(NOW());
SELECT #startDate := DATE_ADD(CAST(NOW() AS DATE), INTERVAL #days DAY),
#endDate := DATE_ADD(DATE_ADD(CAST(NOW() AS DATE), INTERVAL #days DAY), INTERVAL -1 MONTH)
Another demo
Then you can use it like:
SELECT * FROM t
WHERE date_column BETWEEN #startDate AND #endDate

Answer 2

Here is how you can build the desired dates:
SELECT
CURRENT_DATE,
STR_TO_DATE(CONCAT_WS('-', YEAR(CURRENT_DATE), MONTH(CURRENT_DATE), 26), '%Y-%m-%d'),
STR_TO_DATE(CONCAT_WS('-', YEAR(CURRENT_DATE), MONTH(CURRENT_DATE), 26), '%Y-%m-%d') - INTERVAL 1 MONTH
-- 2018-09-25 | 2018-09-26 | 2018-08-26
And use the above in your query:
SELECT SUM(`amount`)
FROM employees
WHERE `date` BETWEEN
STR_TO_DATE(CONCAT_WS('-', YEAR(CURRENT_DATE), MONTH(CURRENT_DATE), 26), '%Y-%m-%d') - INTERVAL 1 MONTH AND
STR_TO_DATE(CONCAT_WS('-', YEAR(CURRENT_DATE), MONTH(CURRENT_DATE), 26), '%Y-%m-%d')
AND `status` = 'Pending';

Answer 3

Try below with now() and last month (DATE_SUB(NOW(), INTERVAL 1 MONTH)):
SELECT SUM(`amount`) FROM employees
WHERE (`date` between DATE_SUB(NOW(), INTERVAL 1 MONTH) and now())
AND `status` = 'Pending';

Answer 4

To Get Current Month use
MONTH(NOW())
To Get Current Year use
YEAR(NOW())
But you don't need these
Use this-
SELECT SUM(`amount`) FROM employees
WHERE (`date` between DATE_ADD(CURDATE(), INTERVAL -1 MONTH) and CURDATE())
AND `status` = 'Pending';
Use CURDATE() to get the current date.
To get same date with previous month use:
DATE_ADD(CURDATE(), INTERVAL -1 MONTH)
As of now on 25/9/2018
SELECT CURDATE()
Output:
2018-09-25
For previous month
SELECT DATE_ADD(CURDATE(), INTERVAL -1 MONTH)
Output:
2018-08-25

Answer 5

Instead of raw query you can use procedure, where it will dynamically create date based on your provided date.
DELIMITER $$
-- Call Get_Sum (15) -- Dynamically you pass the date
DROP PROCEDURE IF EXISTS Get_Sum$$
DELIMITER ;
DELIMITER $$
--
-- Create procedure "Get_Sum"
CREATE DEFINER = 'root'#'localhost'
PROCEDURE Get_Sum(IN Day SMALLINT)
BEGIN
Declare current_month datetime;
Declare previous_month datetime;
Select STR_TO_DATE(CONCAT(year(now()),'-',month(NOW()),'-',Day), '%Y-%m-%d') INTO current_month;
Select DATE_SUB(current_month, INTERVAL 1 MONTH) into previous_month;
SELECT SUM(amount) FROM employees
WHERE (date between previous_month and current_month ) AND status = 'Pending';
END
$$
DELIMITER ;