Question

我有桌子

id  | id_employee    |  start_date  | enddate
--------------------------------------------- 
1   |    A           |   01/04/2018 | 05/04/2018
2   |    B           |   03/04/2018 | 08/04/2018 
3   |    A           |   02/04/2018 | 05/04/2018
4   |    C           |   04/04/2018 | 06/04/2018
5   |    B           |   05/04/2018 | 08/04/2018

我想根据日期范围（从start_date到end_date）进行选择，其中id_employee具有重复数据（在日期范围内发生冲突）

我可以使用什么查询

Answer 1

SELECT `id`, `id_employee`
FROM Table1
WHERE id_employee IN ( 
SELECT T1.id_employee
FROM `Table1` T1 
INNER JOIN
`Table1` T2
ON T1.id_employee=T2.id_employee
AND T1.id <> T2.id
AND DATE(T1.start_date)<=DATE(T2.enddate)
AND DATE(T1.enddate)>= DATE(T2.start_date)
GROUP BY T1.id_employee 
HAVING COUNT(T1.id_employee) > 1
)
ORDER BY id_employee

<强>输出

id  id_employee
1   A
3   A
2   B
5   B

<强>演示

http://sqlfiddle.com/#!9/f1d9c9/32

Answer 2

select aa.id
from `table` aa
where exists (select * from `table` bb
where bb.id <> aa.id and (bb.start_date between aa.start_date and aa.enddate
or bb.enddate between aa.start_date and aa.enddate or
aa.start_date between bb.start_date and bb.enddate
or aa.enddate between bb.start_date and bb.enddate))

这个检查重叠日期和不同的ID。我认为应该是你正在寻找的东西。

Answer 3

您的表格显示3 id_employee即。 A，B和C.如果你想要一个基于日期范围的查询，你的问题不明确：

SELECT id_employee FROM schema.table where start_date>='2018-04-01' and end_date<='2018-04-08' group by id_employee;

Answer 4

我认为最简单的方法是：

select t.*
from t
where exists (select 1
              from t t2
              where t2.id_employee = t.id_employee and
                    t2.id <> t.id and
                    t2.start_date < t.end_date and
                    t2.end_date > t.start_date
             );

Here是一个SQL小提琴。

只需将范围添加到外部查询即可添加日期范围：

select t.*
from t
where exists (select 1
              from t t2
              where t2.id_employee = t.id_employee and
                    t2.id <> t.id and
                    t2.start_date < t.end_date and
                    t2.end_date > t.start_date
             ) and
     t.start_date <= ? and
     t.end_date >= ?;

查询选择在daterange之间有重复数据

4 个答案: