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Convert Bigint time to datetime


Convert Bigint time to datetime

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PSB
PSB
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SELECT DATEADD(hh,-5,dateadd(s, convert(bigint, 1397750400000) / 1000, convert(datetime, '1-1-1970 00:00:00')))

worked for me!
Lynn Pettis
Lynn Pettis
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PSB (4/17/2014)

SELECT DATEADD(hh,-5,dateadd(s, convert(bigint, 1397750400000) / 1000, convert(datetime, '1-1-1970 00:00:00')))

worked for me!


So the BIGINT value was actually milliseconds since midnight 1970-01-01, not minutes. Good to know.

Cool
Lynn Pettis

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Something to consider:


select datediff(m, '0001-01-01', '9999-12-31')



returns 119987

That is the largest difference in minutes between the earliest and latest dates handled by SQL Server. The earliest date it can store is Jan 1 1753, IIRC.

Is 1397750400000 the minute of the Big Bang or something like that?
Jack Corbett
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gbritton1 (4/17/2014)
Something to consider:


select datediff(m, '0001-01-01', '9999-12-31')



returns 119987

That is the largest difference in minutes between the earliest and latest dates handled by SQL Server. The earliest date it can store is Jan 1 1753, IIRC.

Is 1397750400000 the minute of the Big Bang or something like that?


the "m" is MONTH not minute, the shorthand for minute is mi or n. That's why I always spell out the full identifier: MONTH, YEAR, DAY, MINUTE, HOUR, SECOND, MILLISECOND instead of the abbreviation.



Jack Corbett
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Sorry, you're quite right! That should be:


declare @maxminutes bigint = datediff(day, '0001-01-01', '9999-12-31')*cast(24*60 as bigint)
select @maxminutes



which yields: 5258963520
Eirikur Eiriksson
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PSB (4/17/2014)
Minutes


1397750400000 Minutes
23295840000 Hours
970660000 Days
2657522 Years


The first birthday of Homo habilis?
Cool
Lynn Pettis
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Eirikur Eiriksson (4/20/2014)
PSB (4/17/2014)
Minutes


1397750400000 Minutes
23295840000 Hours
970660000 Days
2657522 Years


The first birthday of Homo habilis?
Cool


Actually, it was milliseconds. ;-)

Cool
Lynn Pettis

For better assistance in answering your questions, click here
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For Running Totals and its variations, click here or when working with partitioned tables
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gbritton1 (4/17/2014)
Just do it in a loop, ...


I hope your not serious. Let's see the code that does it in a loop.

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Jack Corbett (4/17/2014)
gbritton1 (4/17/2014)
Something to consider:


select datediff(m, '0001-01-01', '9999-12-31')



returns 119987

That is the largest difference in minutes between the earliest and latest dates handled by SQL Server. The earliest date it can store is Jan 1 1753, IIRC.

Is 1397750400000 the minute of the Big Bang or something like that?


the "m" is MONTH not minute, the shorthand for minute is mi or n. That's why I always spell out the full identifier: MONTH, YEAR, DAY, MINUTE, HOUR, SECOND, MILLISECOND instead of the abbreviation.


Heh... oddly enough, that's why I use the 2 character abbreviations for dateparts.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
PSB
PSB
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I have a couple of 14 digit int time in my table

SELECT DATEADD(hh,-5,dateadd(s, convert(bigint, 61353491400000) / 1000, convert(datetime, '1-1-1970 00:00:00')))

The above query throws an error :

Arithmetic overflow error converting expression to data type int.

Please advise how di I resolve it.

Thanks,
PSB
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