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 datediff with unixtimestamp		  New Topic  Reply to Topic
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aliyesami
Starting Member

USA
30 Posts
Posted - 11/29/2012 :  15:32:52  Show Profile  Reply with Quote
I have a table with date in unix timestamp and iam using the following query to get the dates which are older than 10 mins but its giving me error :

Select class, workstation from ALERTS where active='Y' and datediff(minute, created, getdate()) > 10;

Msg 8115, Level 16, State 2, Line 2
Arithmetic overflow error converting expression to data type datetime.

sunitabeck
Flowing Fount of Yak Knowledge

5152 Posts
Posted - 11/29/2012 :  15:40:24  Show Profile  Reply with Quote
Change it to
Select class, workstation from ALERTS 
where active='Y' and datediff(minute, DATEADD(ss,created,'19700101'), getdate()) > 10;
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jimf
Flowing Fount of Yak Knowledge

USA
2866 Posts
Posted - 11/29/2012 :  15:42:22  Show Profile  Reply with Quote
You know a lot of weird things, Sunita.


Jim

Everyday I learn something that somebody else already knew
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sunitabeck
Flowing Fount of Yak Knowledge

5152 Posts
Posted - 11/29/2012 :  15:45:45  Show Profile  Reply with Quote
Not my fault Jim! I work with a few quants who use unix and perl and epoch time and everything in between. They polluted me.
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robvolk
Most Valuable Yak

USA
15559 Posts
Posted - 11/29/2012 :  15:52:48  Show Profile  Visit robvolk's Homepage  Reply with Quote
Variation that may perform better:
Select class, workstation from ALERTS 
where active='Y' and created < DATEDIFF(second, '1/1/1970', dateadd(minute, -10, getdate()))
If "created" is indexed this can do a seek instead of a scan.
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