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Discuss content posted by Anil Dosapati
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DATALENGTH
17 posts, Page 2 of 2
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Oleg Netchaev
Oleg Netchaev
Posted Monday, August 23, 2010 10:49 AM
SSCommitted
Group: General Forum Members
Last Login: Friday, June 07, 2013 2:42 PM
Points: 1,662,
Visits: 1,710
kevin.l.williams (8/23/2010)
Interesting that this does not work the same way.
select datalength(convert(varchar, getdate(), 101))
This is by design and has also been covered many times in recent QotDs. Forgetting to specify the size when declaring a local variable results in size defaulting to
1
while forgetting to specify the size when using convert -
30
. Because the 101 format means mm/dd/yyyy, totalling 10 characters, the result of the query is
10
because the default
30
is greater than that.
Oleg
Post #973622
kevin.l.williams
kevin.l.williams
Posted Monday, August 23, 2010 11:00 AM
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Last Login: Yesterday @ 7:59 AM
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Oleg Netchaev (8/23/2010)
This is by design and has also been covered many times in recent QotDs. Forgetting to specify the size when declaring a local variable results in size defaulting to
1
while forgetting to specify the size when using convert -
30
. Because the 101 format means mm/dd/yyyy, totalling 10 characters, the result of the query is
10
because the default
30
is greater than that.
Oleg
Thanks.
I never like using implicit coding like this. It seems lazy and risky.
Post #973627
UMG Developer
UMG Developer
Posted Monday, August 23, 2010 2:13 PM
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Nice question, thanks!
I'm surprised after all the recent questions that were related that we still have ~25% answering this one incorrectly.
Post #973725
SQLRNNR
SQLRNNR
Posted Monday, August 23, 2010 3:24 PM
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Last Login: Today @ 3:33 PM
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Visits: 12,443
Thanks for the question
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 #973755
Michael Riemer
Michael Riemer
Posted Tuesday, August 24, 2010 3:42 AM
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Nice question on the basics and all the ensuing explanations - thanks
Post #973956
VM-723206
VM-723206
Posted Tuesday, August 24, 2010 9:00 AM
SSChasing Mays
Group: General Forum Members
Last Login: Saturday, April 06, 2013 12:20 AM
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Nice question.
Post #974202
zymos
zymos
Posted Wednesday, March 07, 2012 2:01 PM
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Great question and pick on the data types. It reminds that by default '1' is assigned to non-defined variable declaration for the char & varchar data types.
Thanks.
Post #1263271
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