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TSQL Challenge 78 - Parse single field into multiple fields


TSQL Challenge 78 - Parse single field into multiple fields

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jacob sebastian
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Comments posted to this topic are about the item TSQL Challenge 78 - Parse single field into multiple fields

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Jeff Moden
Jeff Moden
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This is another contest problem where the best solution wouldn't likely be an "all in one" query.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
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.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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Mike Dougherty-384281
Mike Dougherty-384281
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Jeff Moden (3/19/2012)
This is another contest problem where the best solution wouldn't likely be an "all in one" query.


I suggest the schema should be redesigned and this code would be part of a one-time fix to populate new tables rather than part of ongoing reporting.

I know... this is a vendor's application, entrenched business, just get it done "for today", and a dozen other reasons why we all still have jobs dealing with other people's implementation choices. Smile
Sean Lange
Sean Lange
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LOL. Forget about efficiency I want this in a single query no matter how slow!!! :-D

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Jeff Moden
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I know it's just a contest and a lot of the problems are made up but I really worry about things like this. Judging from the number of people with performance questions on this site and the folks/problems I run into in real life, there are enough people that don't understand how bad all-in-one queries can be.

I liked (haven't been there in a while) Phil Factor's "Speed Phreak" challenges a lot better. They allowed folks to use some very effective "Divide-n-Conquer" methods.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
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.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
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