I have a MySQL database with two fields: Date and Value. My dates are quarters (Q1-2007, Q2-2008...). I want to be able to use the following SQL query:
www.un.org/spanish/sc/presidency.asp * 摘自按日期分列的WHERE 1 ORDER()。
我如何能够这样做?
I have a MySQL database with two fields: Date and Value. My dates are quarters (Q1-2007, Q2-2008...). I want to be able to use the following SQL query:
www.un.org/spanish/sc/presidency.asp * 摘自按日期分列的WHERE 1 ORDER()。
我如何能够这样做?
我猜测你想他们会命令他们,以便所有2007年的数字都按2008年顺序排列。 这一工作应当:
SELECT * FROM table WHERE 1 ORDER BY SUBSTRING(Date, 4, 4), SUBSTRING(Date, 1, 2);
假设你的日期格式是完全一致的,并且你是 日期栏实际上是VARCHAR或类似的......
使用日期栏,并决定每个季度的日期。 然后,你可以利用所建的职能进行日期。
页: 1 * 摘自按日期分列的WHERE 1 ORDER()。 <代码>Date as Q1-2007
,Q2-2007
,Q3-2007
,Q4-2007
? 如果是这样的话,那么应该是怎样分类。
如果届时我会建立一个数据库,以包含这些价值观,那么我就将使用3个领域,并在季度和年份使用两个不同的领域。
I noticed that there were some threads with similar questions, and I did look through them but did not really get a convincing answer. Here s my question: The subquery below returns a Table with 3 ...
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