CASCADE - 2

Question

CASCADE - 2

Ron McCullough

SSC Guru

Points: 63877
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March 25, 2013 at 8:32 pm

#275624

Comments posted to this topic are about the item CASCADE - 2
If everything seems to be going well, you have obviously overlooked something.
Ron

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kapil_kk SSC-Insane Points: 21316 More actions · Answer 1

+1 today 🙂

Last time for DELETE cascade question I lose the points so this time first I prefer to refer BOL before answering this question 😛

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Raghavendra Mudugal SSChampion Points: 10658 More actions · Answer 2

Good one, thank you for posting;

I actually selected 1 and 4 and really not sure what crossed my mind and I ended up selecting the other two... which lead to #facepalm; (and my friend sitting next to me, observes, ... and goes... "what happened man... did your gf dumped you?" and that lead to #headdesk)

ww; Raghu
--
The first and the hardest SQL statement I have wrote- "select * from customers" - and I was happy and felt smart.

kapil_kk SSC-Insane Points: 21316 More actions · Answer 3

Why today there are no replies from people? :w00t::w00t:

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paul.knibbs SSCoach Points: 15320 More actions · Answer 4

This seemed so simple I went and ran the code, sure there must be a catch of some kind--turns out there wasn't, it was as simple as is seemed at first viewing. 🙂

Koen Verbeeck SSC Guru Points: 259085 More actions · Answer 5

Easy one, thanks!

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TomThomson SSC Guru Points: 104773 More actions · Answer 6

Apart from the messed up wording of the answer options this is a good question.

It would have been a better question if more care had been taken with editing the answer options.

And intensly I dislike the horrible violation of 1NF - code examples like this risk teaching really awful habits to inexperienced people who see them.

Tom

mtassin SSC-Insane Points: 23099 More actions · Answer 7

Glad I got this one right... after the last two where I knew the correct answer and just picked the wrong one... I as getting skeered

--Mark Tassin
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Thomas Abraham SSChampion Points: 10761 More actions · Answer 8

Thanks for the question Ron.

I'm developing a bit of paranoia. Even when the question is easy for me, I figure that I am missing something.

As Andy Grove said, only the paranoid survive. (They require therapy and medication. But they survive!)

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(Bob Brown) SSCrazy Points: 2705 More actions · Answer 9

(Bob Brown)

SSCrazy

Points: 2705

March 26, 2013 at 7:02 am

#1600764

Thanks for the great question.

Kevin SSCarpal Tunnel Points: 4962 More actions · Answer 10

L' Eomot Inversé (3/26/2013)
And intensly I dislike the horrible violation of 1NF - code examples like this risk teaching really awful habits to inexperienced people who see them.

I'm very embarrassed to ask this but how does the code example violate 1NF?

TomThomson SSC Guru Points: 104773 More actions · Answer 11

kevin.l.williams (3/26/2013)
L' Eomot Inversé (3/26/2013)
And intensly I dislike the horrible violation of 1NF - code examples like this risk teaching really awful habits to inexperienced people who see them.
I'm very embarrassed to ask this but how does the code example violate 1NF?

Look at the construction of the field OrderDetailID in insertion code. You'll see that the orderdetailID (a single column) is constructed as an integer which when written out in decimal notation has the detail number within the order for which it is being created in the LS three digits and the order number in the more significant digits. This violates the principle that a row contains a single atomic value in each column, never multiple values in a single column - because here we have an order number and an order detail detail number both in the same column in each row.

Tom

Hugo Kornelis SSC Guru Points: 64780 More actions · Answer 12

I think you're reading a bit too much into the code used to create some sample data, Tom. I suspect ROn used this method to eaily visualize which rows belong together, but not with any other intention.

Of course, it is indeed bad practice to form values like this and store them as single column for real data. But for some sample code, I don't object to it.

Hugo Kornelis, SQL Server/Data Platform MVP (2006-2016)
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SqlOnMyMind SSCertifiable Points: 5062 More actions · Answer 13

Hugo Kornelis (3/26/2013)
I think you're reading a bit too much into the code used to create some sample data, Tom. I suspect Ron used this method to easily visualize which rows belong together, but not with any other intention.
Of course, it is indeed bad practice to form values like this and store them as single column for real data. But for some sample code, I don't object to it.

+1 - It's just a simple loop to generate some sample data.

Dana Medley SSCertifiable Points: 6764 More actions · Answer 14

Ez Pz. No got'cha in this question. Thanks!

Everything is awesome!