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Discuss Content Posted by Brandie Tarvin
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Know Your SQL Objects
85 posts, Page 9 of 9
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Know Your SQL Objects
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michael.kaufmann
michael.kaufmann
Posted Monday, May 16, 2011 9:13 AM
Ten Centuries
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Last Login: Wednesday, February 06, 2013 11:51 PM
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Steve Jones - SSC Editor (5/16/2011)
michael.kaufmann (5/16/2011)
I'm even more confused now ...
The edited correct answer reads:
[...] Rows CAN span multiple pages.
[...] Ref: Pages and Extents - http://msdn.microsoft.com/en-us/library/ms190969.aspx Rows CANNOT span pages
BOL is wrong on that page. The overflow and lob data imply that the data that makes up a row can be on two different pages (or more). I think the BOL author copied from previous verisons, and despite later in the paragraph that it lists "this restriction may be relaxed", they have not corrected the initial sentence. It should read that non-variable length data types may not span across pages. So I can't have 9k worth of INT columns.
This wasn't exactly about BOL--but on the edited 'correct answer' that now bears a contradiction in it.
In my opinion the entire 'correct answer' should have been rewritten, and while the link to BOL might still have been included, the phrase
rows cannot span pages
should have been removed and your explanation included instead.
Thanks,
Michael
Post #1109453
Steve Jones - SSC Editor
Steve Jones - SSC Editor
Posted Monday, May 16, 2011 9:40 AM
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Ah, sorry. The explanation editor box is small for me and I didn't see that part of the explanation. It's been fixed.
My apologies.
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Forum Etiquette: How to post data/code on a forum to get the best help
Post #1109504
SQLRNNR
SQLRNNR
Posted Monday, May 16, 2011 10:08 AM
SSCoach
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excellent question. thanks
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 #1109551
pkrudysz
pkrudysz
Posted Thursday, May 26, 2011 4:07 AM
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The below statement is confusing:
"Pages in extents may be assigned to only one object"
Does it mean:
- 1 object and no more than 1 object (false), or
- 1 object is possible (true)
Otherwise, a DBA should get the question right.
Post #1115260
Steve Jones - SSC Editor
Steve Jones - SSC Editor
Posted Thursday, May 26, 2011 8:58 AM
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"may" speaks to possibilities. Extents can be uniform (one object stored) or mixed (multiple objects stored)
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Post #1115574
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