PHP 和 MySql 的日期问题...？

发布于 2024-11-03 11:51:39 字数 1170 浏览 0 评论 0原文

在我的项目中，我使用一个名为“补偿”的表，例如......

+--------------------------------------------------------------+
| Id  |  receiver_Id   |  compensation   |      date           | 
|--------------------------------------------------------------|
| 1   |  5             |  50%            | 2011-02-15 12:15:00 | 
| 2   |  3             |  40%            | 2011-04-05 18:35:00 |
| 3   |  3             |  30%            | 2011-04-25 06:24:00 | 
| 4   |  5             |  45%            | 2011-04-21 19:05:00 |
| 5   |  5             |  60%            | 2011-04-30 12:05:00 |
.......................

这里的日期表示补偿在该特定日期发生变化。对于接收者 5，2011 年 2 月 15 日之前的补偿为 50%。自该日期起，补偿为45% >2011年2月15日12:15:01至2011年4月21日19:05:00`。依此类推....

这里，当我为 receiver 5 创建 2011 年 4 月 的 invoice 时，我必须使用 >截至2011年4月21日为止的补偿为45%，在2011年4月22日至2011年4月30日期间，我必须使用60%作为补偿...

但是如何获取一个月或两个日期之间的补偿，因为补偿可能在一个月内多次修改，如 id 4 和 5 所示......

请帮助我为上述内容编写 SQL或者我必须对表结构进行更改以使其简单......？

提前致谢

原文

In my project I am using a table named "Compensation" like.....

+--------------------------------------------------------------+
| Id  |  receiver_Id   |  compensation   |      date           | 
|--------------------------------------------------------------|
| 1   |  5             |  50%            | 2011-02-15 12:15:00 | 
| 2   |  3             |  40%            | 2011-04-05 18:35:00 |
| 3   |  3             |  30%            | 2011-04-25 06:24:00 | 
| 4   |  5             |  45%            | 2011-04-21 19:05:00 |
| 5   |  5             |  60%            | 2011-04-30 12:05:00 |
.......................

Here the date represents that the compensation is changed on that particular date. For receiver 5, the compensation is 50%before Feb 15 2011. And the compensation is45%fromthe date15 Feb 2011 12:15:01 to 21 April 2011 19:05:00`. And so on....

Here When I create invoice for the month APRIL 2011 for the receiver 5, I have to use the compensation as 45% till date 21 April 2011 and for 22 April 2011 to 30 April 2011 I have to use 60% as compensation...

But How to get the compensation for a month or between 2 dates since the compensation may be modified multiple times in a month as id 4 and 5 shows.......

Please help me writing SQL for the above OR I have to make changes on the table structure to make it simple......?

Thanks in advance

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故笙诉离歌 2024-11-10 11:51:39

当您的表同时跟踪有效起始日期和有效截止日期时，这会容易得多：

+--------------------------------------------------------------+---------------------+
| Id  |  receiver_Id   |  compensation   |      date_from      |      date_to        |
|--------------------------------------------------------------|---------------------|
| 1   |  5             |  50%            | 2011-02-15 12:15:00 | 2011-04-21 19:05:00 | 
| 2   |  3             |  40%            | 2011-04-05 18:35:00 | 2011-04-25 06:24:00 | 
| 3   |  3             |  30%            | 2011-04-25 06:24:00 | 0000-00-00 00:00:00 | 
| 4   |  5             |  45%            | 2011-04-21 19:05:00 | 2011-04-30 12:05:00 | 
| 5   |  5             |  60%            | 2011-04-30 12:05:00 | 0000-00-00 00:00:00 |
.......................

然后您可以查询：

SELECT * FROM compensations
    WHERE (date_to > $start_of_month OR date_to = 0 )
    AND date_from < $end_of_month;

This would be much easier when your table tracked both valid-from and valid-to dates:

+--------------------------------------------------------------+---------------------+
| Id  |  receiver_Id   |  compensation   |      date_from      |      date_to        |
|--------------------------------------------------------------|---------------------|
| 1   |  5             |  50%            | 2011-02-15 12:15:00 | 2011-04-21 19:05:00 | 
| 2   |  3             |  40%            | 2011-04-05 18:35:00 | 2011-04-25 06:24:00 | 
| 3   |  3             |  30%            | 2011-04-25 06:24:00 | 0000-00-00 00:00:00 | 
| 4   |  5             |  45%            | 2011-04-21 19:05:00 | 2011-04-30 12:05:00 | 
| 5   |  5             |  60%            | 2011-04-30 12:05:00 | 0000-00-00 00:00:00 |
.......................

Then you can query:

SELECT * FROM compensations
    WHERE (date_to > $start_of_month OR date_to = 0 )
    AND date_from < $end_of_month;

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短暂陪伴 2024-11-10 11:51:39

第一个 sql 将获取当前月份/年份，

第二个 sql 显示它是用特定月份/年份硬编码的

SELECT * FROM compensations
    WHERE YEAR(date) = YEAR(NOW()) AND MONTH(date) = MONTH(NOW());


SELECT * FROM compensations
    WHERE YEAR(date) = '2011' AND MONTH(date) = '4';

the first sql will fetch the current month/year

the 2nd sql shows it hardcoded with a specific month/year

SELECT * FROM compensations
    WHERE YEAR(date) = YEAR(NOW()) AND MONTH(date) = MONTH(NOW());


SELECT * FROM compensations
    WHERE YEAR(date) = '2011' AND MONTH(date) = '4';

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℡寂寞咖啡 2024-11-10 11:51:39

实际上，您的日期列看起来更像是日期时间类型而不是日期，但是：

select * from yourtable where date between 'yourfirstdate' and 'yourlastdate'

但是请注意，如果您指定日期中的狭窄间隙，那么您的查询将无法返回任何结果（即使使用 Sander Marechal 原始解决方案），因此更好的选择是检查较大的间隙或始终查询 10 个最新行并在代码级别应用日期过滤。

actually your date column looks more like date-time type not date but:

select * from yourtable where date between 'yourfirstdate' and 'yourlastdate'

however be aware that if you specify narrow gap in dates then your query can't return any results (even with Sander Marechal original solution) so a better option would be to check on larger gaps or always query 10 newest rows and apply the date filtering in code level.

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