Question

如何在2个日期之间的2个日期之间选择数据？例如：

start_date - end_date -- title

2014-01-28 2014-02-03 test

2014-02-01 2014-02-15 ests

2014-02-28 2014-03-03 sets

2014-03-01 2014-03-10 sste

问题是，我想在2014-02-02和之间选择数据 2014-02-28与前三名选中因为前三名数据包含在第二个月。

我尝试了这个，但没有效果

SELECT title FROM my_tables WHERE start_date BETWEEN 2014-02-02 AND 2014-02-28

它是如何工作的？

Answer 1

当一个在另一个结束之前开始，而另一个在第一个开始之后结束时，两个周期重叠。这是正确的逻辑：

SELECT title
FROM my_tables
WHERE start_date <= '2014-02-28' and
      end_date >= '2014-02-02';

请注意，日期常量必须使用单引号。

Here是一个SQL小提琴，显示它正常工作。

Answer 2

将单引号添加到日期常量

SELECT title FROM my_tables WHERE start_date BETWEEN '2014-02-02' AND '2014-02-28'

Answer 3

当开头或结尾在另一个范围内时，日期范围与另一个重叠：

given range:    |----|
range 1     |----|           overlaps with given range, because end_date is in that range
range 2            |----|    overlaps with given range, because start_date is in that range
range 3  |----|              does not overlap with given range, because both start and end date are not in that range

SELECT title FROM my_tables 
WHERE (start_date BETWEEN '2014-02-02' AND '2014-02-28')
OR (end_date BETWEEN '2014-02-02' AND '2014-02-28');

Mysql介于两者之间

3 个答案: