Sqlite 将字符串转换为日期

问题描述

我将日期作为字符串存储在 sqlite 数据库中，例如28/11/2010".我想将字符串转换为日期.

I have date stored as string in an sqlite database like "28/11/2010". I want to convert the string to date.

特别是我必须在两个日期之间转换大量字符串日期.

Specifically I have to convert lots of string dates between two dates.

在 postgresql 中，我使用 to_date('30/11/2010','dd/MM/yyyy')，我如何用 sqlite 做同样的事情?

In postgresql, I use to_date('30/11/2010','dd/MM/yyyy'), how can I do the same thing with sqlite?

像这样:

SELECT * FROM table
    WHERE   to_date(column,'dd/MM/yyyy')
    BETWEEN to_date('01/11/2010','dd/MM/yyyy')
    AND     to_date('30/11/2010','dd/MM/yyyy')

推荐答案

As Sqlite 没有日期类型您将需要进行字符串比较以实现此目的.为此，您需要颠倒顺序 - 例如从 dd/MM/yyyy 到 yyyyMMdd，使用类似

As Sqlite doesn't have a date type you will need to do string comparison to achieve this. For that to work you need to reverse the order - eg from dd/MM/yyyy to yyyyMMdd, using something like

where substr(column,7)||substr(column,4,2)||substr(column,1,2) 
      between '20101101' and '20101130'

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