Vignesh Gopalakrishnan Vignesh Gopalakrishnan - 4 months ago 12
MySQL Question

Get the values for last 6 months in mysql

I need to get last six month values from the database. Here is my Fiddle. I need to get the values dynamically. Now February. So I need August to January values from database. If March then the values should automatically change to October to February. So the thing I need to get last six month values.

My Code follows.

CREATE TABLE IF NOT EXISTS `ratepersqft` (
`price_id` int(11) NOT NULL auto_increment,
`project_id` int(11) default NULL,
`date` varchar(255) default NULL,
`rate_per_sqft` double default NULL,
`common_location` varchar(255) default NULL,
PRIMARY KEY (`price_id`)
);

INSERT INTO `ratepersqft` (`price_id`, `project_id`, `date`, `rate_per_sqft`, `common_location`) VALUES
(1, 1, '2012-07-01 ', 2800, 'ECR'),
(2, 2, '2012-07-02 ', 1550, 'ECR'),
(3, 3, '2012-07-03 ', 1850, 'ECR'),
(4, 4, '2012-07-04 ', 4425, 'ECR'),
(5, 5, '2012-07-05 ', 2300, 'ECR'),
(6, 1, '2012-08-01 ', 2900, 'ECR'),
(7, 2, '2012-08-02 ', 1650, 'ECR'),
(8, 3, '2012-08-03 ', 1950, 'ECR'),
(9, 4, '2012-08-04 ', 4525, 'ECR'),
(10, 5, '2012-08-05 ', 2200, 'ECR'),
(11, 1, '2012-09-01 ', 3000, 'ECR'),
(12, 2, '2012-09-02 ', 1450, 'ECR'),
(13, 3, '2012-09-03 ', 2050, 'ECR'),
(14, 4, '2012-09-04 ', 4625, 'ECR'),
(15, 5, '2012-09-05 ', 2100, 'ECR'),
(16, 1, '2012-10-01 ', 3100, 'ECR'),
(17, 2, '2012-10-02 ', 2150, 'ECR'),
(18, 3, '2012-10-03 ', 1850, 'ECR'),
(19, 4, '2012-10-04 ', 4725, 'ECR'),
(20, 5, '2012-10-05 ', 1900, 'ECR'),
(21, 1, '2012-11-01 ', 3200, 'ECR'),
(22, 2, '2012-11-02 ', 2250, 'ECR'),
(23, 3, '2012-11-03 ', 1850, 'ECR'),
(24, 4, '2012-11-04 ', 4825, 'ECR'),
(25, 5, '2012-11-05 ', 2300, 'ECR'),
(26, 1, '2012-12-01 ', 3300, 'ECR'),
(27, 2, '2012-12-02 ', 2350, 'ECR'),
(28, 3, '2012-12-03 ', 1850, 'ECR'),
(29, 4, '2012-12-04 ', 4925, 'ECR'),
(30, 5, '2012-12-05 ', 2400, 'ECR'),
(31, 1, '2013-01-01 ', 3400, 'ECR'),
(32, 2, '2013-01-02 ', 2000, 'ECR'),
(33, 3, '2013-01-03 ', 2450, 'ECR'),
(34, 4, '2013-01-04 ', 5025, 'ECR'),
(35, 5, '2013-01-05 ', 2500, 'ECR'),
(36, 1, '2013-02-01 ', 3500, 'ECR'),
(37, 2, '2013-02-02 ', 2100, 'ECR'),
(38, 3, '2013-02-03 ', 2550, 'ECR'),
(39, 4, '2013-02-04 ', 5125, 'ECR'),
(40, 5, '2013-02-05 ', 2600, 'ECR'),
(41, 1, '2012-06-01 ', 1800, 'ECR'),
(42, 2, '2012-06-02 ', 1150, 'ECR'),
(43, 3, '2012-06-03 ', 1350, 'ECR'),
(44, 4, '2012-06-04 ', 3425, 'ECR'),
(45, 5, '2012-06-05 ', 2100, 'ECR');


I am trying this query and it give me all the values in the Database.

SELECT *
FROM ratepersqft
WHERE MONTH(date) < DATE_SUB(CURDATE(), INTERVAL 6 MONTH)


Hope my question is clear. Thanks in Advance!!!

Answer

For MYSQL: you may use date_add:

 SELECT * FROM ratepersqft 
WHERE date < Now() and date > DATE_ADD(Now(), INTERVAL- 6 MONTH);

For SQL Server:, dateadd :

  SELECT * FROM ratepersqft 
 WHERE date < Now() and date > DATEADD(Month, -6, Now());

http://www.sqlfiddle.com/#!2/1f8029/48

*Please wrap your date column name with backticks given it is a reserved key word. *

MYSQL update:

SQLFIDDLE DEMO

SELECT *
FROM ratepersqft 
WHERE date_format(date,'%Y-%m') < 
                     date_format(now(),'%Y-%m')
and date_format(date,'%Y-%m') >= 
                     date_format(now() - interval 6 month,'%Y-%m')
order by date desc;