CREATE TABLE IF NOT EXISTS `accesscards` ( `id` int(11) NOT NULL AUTO_INCREMENT, `department` varchar(255) NOT NULL, `name` varchar(255) NOT NULL, `entrydates` datetime NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ; INSERT INTO `accesscards` (`id`, `department`, `name`, `entrydates`) VALUES (1, 'test', 't1', '2013-12-06 16:10:00'), (2, 'test', 't1', '2013-12-06 15:10:00'), (3, 'test', 't1', '2013-12-07 15:11:00'), (4, 'test', 't1', '2013-12-07 15:24:00'), (5, 'test', 't2', '2013-12-06 16:10:00'), (6, 'test', 't2', '2013-12-06 16:25:00'), (7, 'test', 't2', '2013-12-07 15:59:00'), (8, 'test', 't2', '2013-12-07 16:59:00');
上面是我的查询,我想获取一个人每天的记录。该记录应具有当天的最小日期时间。我需要该日期时间的完整记录
我的预期输出在这里
我尝试使用
SELECT id, MIN(entrydates) FROM accesscards WHERE 1=1 AND name!='' GROUP BY DATE(entrydates) ORDER BY id
但是对于“ t1”,我得到id = 1和第一行的输入日期。
请帮帮我。如果重复,则提供链接。
SELECT a1.* FROM accesscards a1 JOIN (SELECT name, MIN(entrydates) mindate FROM accesscards WHERE name != '' GROUP BY name, date(entrydates)) a2 ON a1.name = a2.name AND a1.entrydates = a2.mindate
演示