sql - SSMS 2012: Convert DATETIME to Excel serial number

Question

I can't seem to find an answer to this anywhere --- I want to convert a datetime in SQL to the excel serial number.

I'm essentially looking for the DATEVALUE function from excel but for use in SQL

Any ideas on how to do this? thanks

Answer 1

假设所需日期是 2016-05-25

Select DateDiff(DD,'1899-12-30','2016-05-25')

退货

 42515

如果你也想要时间部分

Declare @Date datetime = '2016-05-25 20:00'
Select DateDiff(DD,'1899-12-30',@Date)+(DateDiff(SS,cast(@Date as Date),@Date)/86400.0)

退货

42515.8333333

Answer 2

您只需要将您的datetime价值转换为int并添加1：

SELECT CONVERT(INT,YourDate) + 1
FROM dbo.SomeTable;

Answer 3

使用排序规则：SQL_Latin1_General_CP1_CI_AS

你应该使用

Select DateDiff(DD,'18991230','20160525')

返回 42515

您可以将 '20160525' 替换为 getdate() 或日期字段