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Hierarchies on Steroids #2: A Replacement for...
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Hierarchies on Steroids #2: A Replacement for Nested Sets Calculations
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Jeff Moden
Jeff Moden
Posted Thursday, November 15, 2012 12:03 AM
SSC-Dedicated
Group: General Forum Members
Last Login: Today @ 3:14 PM
Points: 32,906,
Visits: 26,794
Comments posted to this topic are about the item
Hierarchies on Steroids #2: A Replacement for Nested Sets Calculations
--Jeff Moden
"
RBAR
is pronounced "ree-bar" and is a "Modenism" for "
R
ow-
B
y-
A
gonizing-
R
ow".
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column."
For better, quicker answers on T-SQL questions, click on the following...
http://www.sqlservercentral.com/articles/Best+Practices/61537/
For better answers on performance questions, click on the following...
http://www.sqlservercentral.com/articles/SQLServerCentral/66909/
Post #1384987
Theo Ekelmans
Theo Ekelmans
Posted Thursday, November 15, 2012 2:16 AM
Grasshopper
Group: General Forum Members
Last Login: Tuesday, April 09, 2013 10:30 AM
Points: 16,
Visits: 302
Another excellent article, John ! This is really usefull.
Keep e'm coming
Theo
(NL)
Post #1385014
Jeff Moden
Jeff Moden
Posted Thursday, November 15, 2012 7:21 AM
SSC-Dedicated
Group: General Forum Members
Last Login: Today @ 3:14 PM
Points: 32,906,
Visits: 26,794
Theo Ekelmans (11/15/2012)
Another excellent article, John ! This is really usefull.
Keep e'm coming
Theo
(NL)
Thanks, Theo. (my name isn't "John", though
).
--Jeff Moden
"
RBAR
is pronounced "ree-bar" and is a "Modenism" for "
R
ow-
B
y-
A
gonizing-
R
ow".
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column."
For better, quicker answers on T-SQL questions, click on the following...
http://www.sqlservercentral.com/articles/Best+Practices/61537/
For better answers on performance questions, click on the following...
http://www.sqlservercentral.com/articles/SQLServerCentral/66909/
Post #1385149
Michael Meierruth
Michael Meierruth
Posted Thursday, November 15, 2012 11:21 AM
SSC-Addicted
Group: General Forum Members
Last Login: Yesterday @ 2:09 PM
Points: 480,
Visits: 1,605
They both start with J. He was close.
Post #1385284
SQLRNNR
SQLRNNR
Posted Thursday, November 15, 2012 2:06 PM
SSCoach
Group: General Forum Members
Last Login: Monday, May 20, 2013 1:07 PM
Points: 18,733,
Visits: 12,332
Another fine piece Jeff.
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 #1385362
JJ B
JJ B
Posted Thursday, November 15, 2012 2:44 PM
SSC Veteran
Group: General Forum Members
Last Login: 2 days ago @ 3:08 PM
Points: 255,
Visits: 2,407
Wow. Both articles are awesome. Not only is your code well documented (as usual), but the charts were also extremely useful in helping to explain the text. Well done and thanks for taking the time to really explain the methods.
Post #1385371
adrian.facio
adrian.facio
Posted Thursday, November 15, 2012 3:36 PM
Old Hand
Group: General Forum Members
Last Login: Monday, January 21, 2013 8:22 AM
Points: 313,
Visits: 312
Learned a lot.
Post #1385383
dwain.c
dwain.c
Posted Thursday, November 15, 2012 7:28 PM
SSCrazy
Group: General Forum Members
Last Login: Today @ 6:03 AM
Points: 2,345,
Visits: 3,191
Jeff - Working through it now but its pretty deep and I expect it will take me awhile.
Great explanations though!
I'm going to try to see if I can adapt the approach to another problem I encountered recently that is "not quite" a hiearchy.
Let me know if you decide to change your name to John. I have several article attributions to you I'll need to change.
No loops! No CURSORs! No RBAR! Hoo-uh!
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
Since random numbers are too important to be left to chance, let's generate some!
Are you too recursively challenged?
Splitting strings based on patterns can be fast!
Post #1385418
Jeff Moden
Jeff Moden
Posted Thursday, November 15, 2012 11:54 PM
SSC-Dedicated
Group: General Forum Members
Last Login: Today @ 3:14 PM
Points: 32,906,
Visits: 26,794
Michael Meierruth (11/15/2012)
They both start with J. He was close.
4 Letters, too!
--Jeff Moden
"
RBAR
is pronounced "ree-bar" and is a "Modenism" for "
R
ow-
B
y-
A
gonizing-
R
ow".
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column."
For better, quicker answers on T-SQL questions, click on the following...
http://www.sqlservercentral.com/articles/Best+Practices/61537/
For better answers on performance questions, click on the following...
http://www.sqlservercentral.com/articles/SQLServerCentral/66909/
Post #1385486
Jeff Moden
Jeff Moden
Posted Thursday, November 15, 2012 11:57 PM
SSC-Dedicated
Group: General Forum Members
Last Login: Today @ 3:14 PM
Points: 32,906,
Visits: 26,794
dwain.c (11/15/2012)
Jeff - Working through it now but its pretty deep and I expect it will take me awhile.
Great explanations though!
I'm going to try to see if I can adapt the approach to another problem I encountered recently that is "not quite" a hiearchy.
Let me know if you decide to change your name to John. I have several article attributions to you I'll need to change.
Thanks, Dwain. I'd be interested in your "not quite a hierarchy" problem. Sounds interesting.
Heh... nah. Not going to change my name. Too much paper work for us all.
--Jeff Moden
"
RBAR
is pronounced "ree-bar" and is a "Modenism" for "
R
ow-
B
y-
A
gonizing-
R
ow".
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column."
For better, quicker answers on T-SQL questions, click on the following...
http://www.sqlservercentral.com/articles/Best+Practices/61537/
For better answers on performance questions, click on the following...
http://www.sqlservercentral.com/articles/SQLServerCentral/66909/
Post #1385488
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