Mysql的排序日期格式

Question

我有一個不可避免的情況下日期將被保存在英國的日期格式，例如：

31/12/2001 00:00:00 

我需要按降序排列，我已經試過，但它的錯誤

select *, DATE_FORMAT(completiondate,'\%e/%c/%Y\') as cdate 
from projects 
where countries = 1 
order by cdate desc 

錯誤：

check the manual that corresponds to your MySQL server version for the the right syntax to use near '' order by cdate desc'

我使用MySQL 4.1.9

Answer 1

你正在逃避%字符不必要的。但實際的問題是，你有一個未終止字符串您的查詢文字：

-- this does not terminate the string ----------v 
select *, DATE_FORMAT(completiondate,'\%e/%c/%Y\') as cdate 
from projects 
where countries = 1 
order by cdate desc 

更改爲：

SELECT *, DATE_FORMAT(completiondate,'%e/%c/%Y') AS cdate 
FROM projects 
WHERE countries = 1 
ORDER BY cdate DESC 

Answer 2

SELECT * FROM projects WHERE countries = 1 order by cdate desc 

我猜你已經在你的數據庫cdate？如果是這樣，你不需要設置「date_format」，因爲它已經在那裏。 但我可能是錯誤的，因爲我從來沒有用過4.1.9

Answer 3

這是最終解決方案

select *,completiondate from projects order by str_to_date(completiondate,'%d/%m/%Y %H:%i') desc 

Answer 4

吉姆，您的最終解決方案對我來說是巨大的幫助。我的日期格式爲02/28/2013。我使用的代碼：

SELECT *,str_to_date(SaleDate,'%m/%d/%Y') AS cdate FROM mytable ORDER BY cdate DESC 

謝謝！