兩個日期之間的天數差異

Question

我對此很陌生。 我需要在此查詢的單獨列中獲得t.1start和t1.finish之間的天數差異。

謝謝，路易

SELECT ROW_NUMBER() OVER(ORDER BY TOWN) AS 'row', 
T1.Surname,
T1.Forename,
T1.Town,
T1.Description,
T1.Sex,
T1.DOB,
T1.start,
T1.finish,
FROM dbo.viewServiceContractFull T1 
WHERE
T1.finish>='2013/01/01'
and 
T1.finish<='2013/01/31'

現在如何只查詢某些城鎮？

Answer 1

在SQL Server中，您可以使用

SELECT DATEDIFF (MyUnits, '2010-01-22 15:29:55.090', '2010-01-22 15:30:09.153')

Answer 2

您可以使用DATEDIFF函數確定兩個日期之間的間隔，如果需要，可以使用CAST / CONVERT將字符串日期轉換為真實日期，例如：

CAST('2010-01-22 15:29:55.090' AS DATETIME)

轉換功能使您可以選擇日期格式。

Answer 3

SELECT ROW_NUMBER() OVER(ORDER BY TOWN) AS 'row', 
T1.Surname,
T1.Forename,
T1.Town,
T1.Description,
T1.Sex,
T1.DOB,
T1.start,
T1.finish, cast(DATEDIFF(DAY,T1.start,T1.finish) as varchar) as difference
FROM dbo.viewServiceContractFull T1 
WHERE
T1.finish>='2013/01/01'
and 
T1.finish<='2013/01/31'

另外看看這個