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Fun(?) with DATETIME2
84 posts, Page 2 of 9
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Fun(?) with DATETIME2
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pitvax
pitvax
Posted Monday, December 27, 2010 5:19 AM
Old Hand
Group: General Forum Members
Last Login: Friday, May 10, 2013 12:42 AM
Points: 316,
Visits: 143
gserdijn 2010-12-27
Hmm, undoubtedly this Q will come once again. But for a different country... like Holland.
(Which should be The Netherlands by the way, but I digress)
This is also my addition to this question. I am living in Czech Republic (formerly Czech Lands) and there was Gregorian Calendar adopted 'several' years before - It was in 1584 ... days between 6th January and 17th January 1584 was 'canceled'.
__________________________________
Standing on the shoulders of giants ...
Post #1039373
David Data
David Data
Posted Monday, December 27, 2010 5:53 AM
SSC-Enthusiastic
Group: General Forum Members
Last Login: Tuesday, May 07, 2013 3:28 AM
Points: 115,
Visits: 719
I agree with
cdiebolt
. While there was no such date in England's dating system at the time, it's a perfectly valid date in the Gregorian calendar, and corresponds to various dates in various countries' national systems.
So the function DOES do what I expected, hence it runs perfectly. "Perfect" is in the of the beholder, so not a word to be used in a specification - unless itself specified for the occasion. Please make the possible answers unambiguous in future - and scope the conditions precisely too.
I wonder if anyone has created a nation-sensitive historic date system in which
Date('1752-09-02') + 1
would give the correct result depending on country. e.g.
'1752-09-13'
in England (and I think the rest of the UK), and
'1752-09-03'
in The Netherlands? It would be hard to do; you couldn't use ISO country codes to indicate locale, as some no longer exist and others (e.g. Belgium) were parts of multiple other countries at the time.
Post #1039379
Richard M Karpel
Richard M Karpel
Posted Monday, December 27, 2010 6:15 AM
SSC Eights!
Group: General Forum Members
Last Login: Thursday, June 30, 2011 3:44 AM
Points: 971,
Visits: 62
I did not know about the 1752, though I should have.
I totally expected it to work after going over the BOL entry on
datetime2
. It is the first time, that I do not mind getting an answer wrong, cause I
learned
something new & useful. Thx for the excellent question.
Post #1039388
vk-kirov
vk-kirov
Posted Monday, December 27, 2010 6:50 AM
Hall of Fame
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Last Login: Today @ 5:42 AM
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I wonder how many records in one's database containing year 1752
Post #1039397
crussell-931424
crussell-931424
Posted Monday, December 27, 2010 6:59 AM
SSCommitted
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Last Login: Thursday, May 16, 2013 7:52 AM
Points: 1,713,
Visits: 61
I didn't expect it to fail so how can you say I did?
Post #1039400
Brandie Tarvin
Brandie Tarvin
Posted Monday, December 27, 2010 8:27 AM
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Last Login: Today @ 10:58 AM
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Interesting. I didn't know the Gregorian calendar adoption for the British Empire was in 1752. All the history I studied talked about the Gregorian calendar being created in the 1500's, so I just assumed adoption was across the board in the same time frame.
Brandie Tarvin, MCITP Database Administrator, MCDBA, MCSA
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Post #1039431
David Data
David Data
Posted Monday, December 27, 2010 8:36 AM
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Last Login: Tuesday, May 07, 2013 3:28 AM
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BTW Microsoft's
documentation
has an error too - it says "
Accuracy 100 nanoseconds
". This is of course the
Resolution
(or Precision) of the data.
The accuracy will depend on the original source of the time-stamp - which in my experience can vary from minutes (old server nobody cares about) to milliseconds (typical NTP setup). You'll only get 100 nSec accuracy in systems very tightly coupled to GPS (or a satellite-coordinated atomic clock). Even then, by the time some code has decided to date an event many many μSecs will have passed.
Post #1039440
Phil Huffstatler
Phil Huffstatler
Posted Monday, December 27, 2010 9:26 AM
SSC-Enthusiastic
Group: General Forum Members
Last Login: Wednesday, January 09, 2013 1:27 PM
Points: 197,
Visits: 64
Fired up my local SQL 2008 Mgmt Studio, put the code into the query window (on Master), hit F5, and got: 1752-09-09 00:00:00.0000000
So, why do I now have an X on my test answer? I wasn't wrong, my SQL install isn't wrong... the world is.... :)
Oh well,
Phil
Post #1039466
SQLRNNR
SQLRNNR
Posted Monday, December 27, 2010 10:10 AM
SSCoach
Group: General Forum Members
Last Login: Yesterday @ 1:07 PM
Points: 18,733,
Visits: 12,332
Total guess on this question. The question asks for opinions and the answer is an opinion. Based on that, I see more than one possible answer.
Jason
AKA CirqueDeSQLeil
I have given a name to my pain...
MCM SQL Server 2008
SQL RNNR
Posting Performance Based Questions - Gail Shaw
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Post #1039484
SQL-DBA-01
SQL-DBA-01
Posted Monday, December 27, 2010 11:00 AM
Right there with Babe
Group: General Forum Members
Last Login: Yesterday @ 9:12 AM
Points: 738,
Visits: 1,125
I guessed Option:1.
SSMS QA says: 1752-09-09 00:00:00.0000000
Not sure, why the correct answer is :: Option No: 3
Thanks.
Post #1039510
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