MySQL日期格式 [英] MySQL date format
问题描述
当我创建一个表并在mysql中创建一个类型date的字段时,它会将日期类似于0000-00-00。是否可以将格式更改为dm-Y?
When I make a table and create a field of type date in mysql, it stores date like 0000-00-00. Is it possible to change the format to 'd-m-Y'?
推荐答案
搜索:日期和时间类型的存储要求
日期内部存储为一个三字节整数打包为DD + MM×32 + YYYY×16×32
但是,如果您选择显示的日期列,则必须以一些方式显示,因此它显示为0000-00-00 。将 存储为具有特定格式的字符(10)。
But, if you select a date column for display, it has to be shown in some way, so it comes out as 0000-00-00. It is not stored as a char(10) with that specific format.
如果显示,则需要查看特定格式,您可以使用 Date_Format()。但是,请记住,如果您在编程工具中使用查询,则这是 您要做什么。您希望生成日期值,为了显示,您将使用与所使用的任何编程环境相似的格式化功能。
If, for display, you need to see a specific format, you can convert it to VARCHAR in a specific format using Date_Format(). However, bear in mind that if you are using the query in a programming tool, this is not what you want to do. You want the raw date value, for display purposes, there will be a similar formatting function from whatever programming environment you use.
请参阅DATE_FORMAT中的参考,您将要使用 '%d-%m-%Y'
,例如
As you can see from the reference in DATE_FORMAT, you will want to use '%d-%m-%Y'
, e.g.
SELECT col1, col2, DATE_FORMAT(datecolumn, '%d-%m-%Y') AS datecolumn, more1...
FROM sometable
....
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