DATEADD function - SQL Server Forums

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DATEADD function

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revdnrdy
Posting Yak Master

220 Posts

Posted - 2009-01-07 : 18:13:11

Hello..

This is a question about DATEADD function.
This is from sql server 2005

Why does the first sql statement return an error? They are identical sans the unix timestamp..

select dateadd(ss,2359934342,'01/01/1970')
result: Arithmetic overflow error converting expression to data type int.

But this one returns a date as expected
select dateadd(ss,1078576968,'01/01/1970')
result: 2004-03-06 12:42:48.000

thanks for any feedback..

r&r

tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2009-01-07 : 18:15:24

Try converting the 235 value to a bigint, not sure if dateadd can accept a bigint. I haven't tested of course.

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

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Michael Valentine Jones
Yak DBA Kernel (pronounced Colonel)

7020 Posts

Posted - 2009-01-07 : 18:29:26

The error message you got tells you exactly what the problem is:
you cannot convert the number 2359934342 to a datatype of integer.

The largest possible value for datatype integer is 2147483647.

This code should do what you want:


select
	DT =dateadd(ss,a.x%86400,dateadd(dd,a.x/86400,'19700101'))
from
	( select x = convert(bigint,2359934342) ) a


Results:
DT
-------------------------
2044-10-13 01:19:02.000

CODO ERGO SUM

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