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Discuss content posted by John Schroeder
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Cast as datetime question
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Cast as datetime question
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john schroeder-334489
john schroeder-334489
Posted Tuesday, November 17, 2009 9:31 PM
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Last Login: Tuesday, September 28, 2010 2:33 PM
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Comments posted to this topic are about the item
Cast as datetime question
Post #820551
Bhavesh_Patel
Bhavesh_Patel
Posted Wednesday, November 18, 2009 3:48 AM
SSChasing Mays
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Last Login: Friday, January 11, 2013 12:41 PM
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That was tricky one.
I didn't knew that when a number is casted to DATETIME, that number is added '1/1/1900' and returns the resulting date.
Bhavesh Patel
http://bhaveshgpatel.wordpress.com/
Post #820688
Ben Leighton
Ben Leighton
Posted Wednesday, November 18, 2009 5:34 AM
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Nice question... demonstrates how the subtraction operation implicitly casts the result as an integer data type thus avoiding the error message that '435365' on its own would have caused.
Post #820732
ronmoses
ronmoses
Posted Wednesday, November 18, 2009 5:35 AM
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A neat question, but since I didn't see a reason for any of the implicit conversions not to work, I assumed the one datetime value on the list had to be the correct answer. If there was another datetime option I probably would have had to guess.
-----
a haiku...
NULL is not zero
NULL is not an empty string
NULL is the unknown
Post #820734
chrisn-585491
chrisn-585491
Posted Wednesday, November 18, 2009 6:53 AM
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This doesn't work in SQL Server 2005 TSQL , end up with an a Msg 1305...
Post #820786
ronmoses
ronmoses
Posted Wednesday, November 18, 2009 7:23 AM
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chrisn-585491 (11/18/2009)
This doesn't work in SQL Server 2005 TSQL , end up with an a Msg 1305...
Works perfectly for me in 2005.
-----
a haiku...
NULL is not zero
NULL is not an empty string
NULL is the unknown
Post #820821
Ben Leighton
Ben Leighton
Posted Wednesday, November 18, 2009 7:24 AM
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chrisn-585491 (11/18/2009)
This doesn't work in SQL Server 2005 TSQL , end up with an a Msg 1305...
worked for me in 2005
Post #820824
chrisn-585491
chrisn-585491
Posted Wednesday, November 18, 2009 7:36 AM
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Restarted Management Studio and the results work now as expected...
Post #820837
Dan Guzman - Not the MVP
Dan Guzman - Not the MVP
Posted Wednesday, November 18, 2009 9:19 AM
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Interesting, I got this wrong because in Excel 434115 = July 24th 3088, not the 26th. Why there is a difference of 2 days over a 1100+ year gap is beyond me. Sum of leap minutes?
Post #820933
Hiren Shah 3
Hiren Shah 3
Posted Wednesday, November 18, 2009 9:29 AM
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Here is how i got it!!!
select dateadd("d",'435365'-1250, cast (0 as datetime))
Hiren
Hiren Shah
KISS (Keep It Simple Stupid)
Post #820943
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