Question

我需要找到SQL Server 2014中状态更改之间的天数。

例如，请参阅下面的数据

+--------+--------+------------+-------------+
| status | Number | updated_on | opened_at   |
+--------+--------+------------+-------------+
| Draft  | 100    | 2017-11-03 | 2017-11-03  |
| Draft  | 100    | 2017-12-12 | 2017-11-03  |
| WIP    | 100    | 2017-12-12 | 2017-11-03  |
| Appr   | 100    | 2018-01-05 | 2017-11-03  |
| Launch | 100    | 2018-01-10 | 2017-11-03  |
| Close  | 100    | 2018-01-11 | 2017-11-03  |
+--------+--------+------------+-------------+

根据以上输入，我需要

Draft --- 40 days,
WIP --- 23 days,
appro -- 5 days,
deploy/launch - 1 days,
closed --- 69 days

请帮我查询SQL查询结果。

感谢。

Answer 1

我认为你的数字是对的。但这应该做你想要的，假设状态是唯一的：

select status,
       datediff(day, updated_on, lead(updated_on) over (order by updated_on) ) as days
from t;

但是，我不了解第一个和最后一个数字。

Answer 2

试试这个

SELECT
tb.status,
DATEDIFF(dayofyear, tb.opened_at, tb.LastUpdate) AS  DaysInDifference
FROM
(
SELECT 
DISTINCT
status,
Max(updated_on) OVER(PARTITION BY [status]  )LastUpdate,
opened_at
FROM Table1
)AS tb

SQL Server中状态更改之间的天数

2 个答案: