shi*_*hin 1 mysql sql-order-by
订单是11月和10月.如何向此添加ORDER BY,以便按月,Jan,Feb,Mar等订单.
提前致谢.
CREATE TABLE `hw_homework` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`studentid` int(10) NOT NULL,
`subjectid` int(10) NOT NULL,
`assignment_name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`teacherid` int(10) NOT NULL,
`date` date NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=55 ;
--
-- Dumping data for table `hw_homework`
--
INSERT INTO `hw_homework` (`id`, `studentid`, `subjectid`, `assignment_name`, `teacherid`, `date`) VALUES
(52, 56, 13, '1A', 20, '2012-10-28'),
(53, 56, 6, '12', 18, '2012-10-28'),
(54, 56, 4, 'page42', 59, '2012-11-02');
SELECT studentID,
DATE_FORMAT(`date`,'%M') `month`,
COUNT(studentid) totalMissed
FROM hw_homework
WHERE studentid = 56
GROUP BY studentid, DATE_FORMAT(`date`, '%M')
Run Code Online (Sandbox Code Playgroud)
| 归档时间: |
|
| 查看次数: |
20090 次 |
| 最近记录: |