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DateTime Precision
37 posts, Page 4 of 4
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OzYbOi d(-_-)b
OzYbOi d(-_-)b
Posted Monday, November 28, 2011 9:12 AM
Ten Centuries
Group: General Forum Members
Last Login: Thursday, January 31, 2013 8:53 AM
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tks all for the commentary today too!
Post #1212574
SQLRNNR
SQLRNNR
Posted Monday, November 28, 2011 9:25 AM
SSCoach
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Last Login: 2 days ago @ 1:07 PM
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Thanks for the ¿
Jason
AKA CirqueDeSQLeil
I have given a name to my pain...
MCM SQL Server 2008
SQL RNNR
Posting Performance Based Questions - Gail Shaw
Posting Data Etiquette - Jeff Moden
Hidden RBAR - Jeff Moden
VLFs and the Tran Log - Kimberly Tripp
Post #1212584
KWymore
KWymore
Posted Monday, November 28, 2011 11:00 AM
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Interesting question. Thanks!
Post #1212660
john.arnott
john.arnott
Posted Monday, November 28, 2011 11:05 AM
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Hugo Kornelis (11/28/2011)
roger.plowman (11/28/2011)
Using single quotes for both strings and dates is a brain-dead design decision--period.
Technically, T-SQL is not using single quotes for both strings and dates. It uses single quotes for strings only.
There is no way to have date literals in T-SQL; that's why we have to make do with string literals that will be converted (at execution time) to date or datetime values.
</pedantic>
Single quotes ARE for strings only, true. So the trouble comes from our getting used to implicit conversions and expecting them based on our human experience. As may have been noticed in the past, MS SQL is not human
. We either have to remind ourselves to consider datatypes (as so many QODs do), or look for MS to require explicit conversion, either with a CAST/CONVERT or special delimiters as with the suggested pound-sign notation
#2011-11-28#
. If I'm voting, I say leave it as is and stay alert.
Post #1212665
jkelly
jkelly
Posted Monday, November 28, 2011 12:24 PM
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Guilty as charged. I fell for this in a production environment. It was a particularly difficult bug to find. I Did not recognize it was doing the implicit conversion as strings.
Cheers, J
Post #1212703
rfr.ferrari
rfr.ferrari
Posted Tuesday, November 29, 2011 3:10 AM
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good question!
rfr.ferrari
DBA
- SQL Server
2008
MCITP | MCTS
remember is live or suffer twice!
Post #1213039
andagr
andagr
Posted Tuesday, November 29, 2011 4:44 AM
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Last Login: Tuesday, August 21, 2012 1:15 AM
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Ouch, you got me, I assumed implicit conversion without thinking it through. Thanks for the question.
/@devandreas
Post #1213067
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