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Manipulate Horizontal Hierarchy with UNPIVOT


Manipulate Horizontal Hierarchy with UNPIVOT

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diaz.bernabe
diaz.bernabe
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Comments posted to this topic are about the item Manipulate Horizontal Hierarchy with UNPIVOT
dwain.c
dwain.c
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You might want to look into using the CROSS APPLY VALUES approach to UNPIVOT (see the first article in my signature links). I find it much more readable that multiple UNPIVOTs and it seems to perform better as well.


My mantra: No loops! No CURSORs! No RBAR! Hoo-uh!

My thought question: Have you ever been told that your query runs too fast?

My advice:
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?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
Since random numbers are too important to be left to chance, let's generate some!
Learn to understand recursive CTEs by example.
Splitting strings based on patterns can be fast!
My temporal SQL musings: Calendar Tables, an Easter SQL, Time Slots and Self-maintaining, Contiguous Effective Dates in Temporal Tables
diaz.bernabe
diaz.bernabe
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Thanks!, good stuff! I will practice your technic!
Cheers!
Iwas Bornready
Iwas Bornready
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Thanks for the script.
Iwas Bornready
Iwas Bornready
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dwain.c (1/15/2013)
You might want to look into using the CROSS APPLY VALUES approach to UNPIVOT (see the first article in my signature links). I find it much more readable that multiple UNPIVOTs and it seems to perform better as well.
Thanks for the extra tip.
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