MySQL:对于开始日期和结束日期之间的日期的IN子句?

时间:2011-11-04 19:56:41

标签: mysql sql

我有YYYY-MM格式的日期列表,我有一个包含starts_atends_at列的记录表。

我想查找传入列表中任何给定日期在starts_atends_at范围内的所有记录。

所以,给定2011-01, 2011-05, 2011-10,我想:

| id | starts_at           | ends_at             | title                             |
| 3  | 2010-12-05 00:00:00 | 2011-02-02 00:00:00 | something cool                    |
| 4  | 2011-03-14 00:00:00 | 2011-05-01 00:00:00 | something else really cool        |
| 5  | 2011-10-31 00:00:00 | 2012-12-23 00:00:00 | argh! end of the world! not cool! |

...虽然这些记录将被省略:

| id | starts_at           | ends_at             | title                             |
| 6  | 2010-10-05 00:00:00 | 2010-12-02 00:00:00 | something uncool                  |
| 7  | 2011-03-14 00:00:00 | 2011-04-31 00:00:00 | something else really uncool      |
| 8  | 2011-12-23 00:00:00 | 2013-01-01 00:00:00 | yay! we're still alive! cool!     |

如何在SQL中编写此WHERE条件?


澄清:我正在寻找纯SQL的解决方案(我正在使用存储过程,因此通过PHP之类的其他语言进行动态注入实际上是不可能的,到目前为止我知道),日期列表作为string(HTML表单输入)传递给查询。如果我能在SQL中以编程方式执行此操作,我很乐意将其分解为顺序BETWEEN语句,但我不知道如何做到这一点。

基本上,我需要一种在纯SQL中表达以下逻辑的方法:

$months = explode(',', '2011-01,2011-05,2011-10');
$q = "SELECT records.* FROM records WHERE";
foreach($months as $month) {
  $q .= " '$month' BETWEEN records.starts_at AND records.ends_at OR";
}
$q = substr($q, 0, -3) . ';';

2 个答案:

答案 0 :(得分:2)

SELECT id, starts_at, ends_at, title
FROM yourtable
WHERE '2011-01-01' BETWEEN starts_at AND ends_at
OR    '2011-05-01' BETWEEN starts_at AND ends_at
OR    '2011-10-01' BETWEEN starts_at AND ends_at

答案 1 :(得分:0)

您可以将月份说明符翻译为月初和月末(someom)并自行完成:

SET sql_mode='ansi';

SELECT neezer.*
  FROM neezer
  JOIN (SELECT m || '-01' AS som,
               DATE_SUB(DATE_ADD(m || '-01', INTERVAL 1 MONTH), INTERVAL 1 SECOND) AS eom
          FROM (SELECT '2011-01' AS m
                 UNION ALL
                SELECT '2011-05'
                 UNION ALL
                SELECT '2011-10') d) month_intervals
       ON som <= ends_at AND eom >= starts_at;

因此,我们将每个'2011-01'转换为配对的DATE和DATETIME,然后计算重叠。 (我们将eom转换为'YYYY-MM-DD 23:59:59'的原因是'2011-01'匹配starts_at'2011-01-01 01:00: 00'(否则eom将在第一天被强制到00:00:00,与我们的starts_at不匹配。