问题描述
我在尝试按时间戳值对某些结果进行排序时遇到了问题.
I have come across a problem when trying to order certain results by their timestamp value.
我希望根据时间戳值从最新到最旧显示这些结果.
I would like these results displayed from the newest, to the oldest based on the timestamp values.
为了解释这一点，假设有 3 个结果:
So to explain this, imagine that there were 3 results:
2012-07-11 17:34:57
2012-07-11 17:33:28
2012-07-11 17:33:07
这个结果集是我所需要的，但给出了以下查询
This result set would be what I would require, but given the following query
SELECT timestamp
FROM randomTable
ORDER BY timestamp ASC
我明白了:
2012-07-11 17:34:57
2012-07-11 17:33:07
2012-07-11 17:33:28
这是按数值排序的，07在28之前.
This is as it is sorted by numerical value and 07 comes before 28.
如果我按降序排序，我得到
If i sort in descending order I get
2012-07-11 17:33:07
2012-07-11 17:33:28
2012-07-11 17:34:57
这是我要找的……但它是相反的.
Which is what I am looking for... But it is in reverse.
所以我的问题很简单，如何按照我描述的升序对这些值进行排序?
So my question is fairly simple, how could I sort these values in ascending order as I have described?
CREATE TABLE `user_quotations` (
`id` int(100) NOT NULL AUTO_INCREMENT,
`quoteNumber` int(100) NOT NULL,
`lastModified` datetime NOT NULL,
`userId` int(100) NOT NULL,
`manufacturer` varchar(250) COLLATE latin1_general_ci NOT NULL,
`modelNumber` varchar(250) COLLATE latin1_general_ci NOT NULL,
`productDesc` varchar(1000) COLLATE latin1_general_ci NOT NULL,
`timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id`),
KEY `quoteNumber` (`quoteNumber`,`lastModified`,`userId`,`manufacturer`,`modelNumber`,`timestamp`),
KEY `productDesc` (`productDesc`)
) ENGINE=MyISAM AUTO_INCREMENT=8 DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci
推荐答案
您的查询:
SELECT timestamp
FROM randomTable
ORDER BY timestamp ASC;
是完美的.但我怀疑您在帖子中提供的结果.你发布了:
is perfect. But I doubt about the results you have presented in your posting. You posted :
2012-07-11 17:34:57
2012-07-11 17:33:07
2012-07-11 17:33:28
但是结果在你的sqlbox中显示:
But results in your sqlbox shows :
2012-07-11 17:34:57
2012-07-15 17:33:07
2012-07-15 17:33:28
这是完全正确的.
这是您发帖中的拼写错误吗?
如果没有，请尝试以下操作:
Is that a typo error in your posting?
If no, then try the following :
SELECT timestamp( `timestamp` ) as 'timestamp'
FROM randomTable
ORDER BY 1 ASC;
这篇关于MYSQL - 按从最新到最旧的顺序升序排列时间戳值?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！