<a href="http://g.adspeed.net/ad.php?do=clk&zid=15220&wd=468&ht=60&pair=as" target="_blank"><img style="border:0px;" src="http://g.adspeed.net/ad.php?do=img&zid=15220&wd=468&ht=60&pair=as" alt="i" width="468" height="60"/></a>
Log in
::
Register
::
Not logged in
Home
Tags
Articles
Editorials
Stairways
Forums
Scripts
Videos
Blogs
QotD
Books
Ask SSC
SQL Jobs
Training
Authors
About us
Contact us
Newsletters
Write for us
<a href="http://g.adspeed.net/ad.php?do=clk&zid=15491&wd=120&ht=300&pair=as" target="_top"><img style="border:0px;" src="http://g.adspeed.net/ad.php?do=img&zid=15491&wd=120&ht=300&pair=as" alt="i" width="120" height="300"/></a>
Recent Posts
Recent Posts
Popular Topics
Popular Topics
Home
Search
Members
Calendar
Who's On
Home
»
SQL Server 2012
»
SQL 2012 - General
»
normalization vs de-normalization ?
14 posts, Page 2 of 2
««
1
2
normalization vs de-normalization ?
Rate Topic
Display Mode
Topic Options
Author
Message
Jeff Moden
Jeff Moden
Posted Thursday, January 10, 2013 9:02 AM
SSC-Dedicated
Group: General Forum Members
Last Login: Today @ 7:51 PM
Points: 32,910,
Visits: 26,800
opc.three (1/10/2013)
Agreed, not about shooting the test writer but about the nonsensical options. You literally have to rule out all the real choices based on how ambiguous they are. "Compare and contrast normalization and de-normalization with respect to data modifications and the expense of data retrieval."
Now that's a solid question, albeit that approach tends to fall down when writing a multiple choice exam
Did you see the other question concerning the model database? Nah... shoot the test writers.
--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 #1405512
opc.three
opc.three
Posted Thursday, January 10, 2013 9:11 AM
SSCertifiable
Group: General Forum Members
Last Login: Today @ 6:57 PM
Points: 6,724,
Visits: 11,771
No, please share. Nothing like a good witch hunt on a Thursday morning.
__________________________________________________________________________________________________
There are no special teachers of virtue, because virtue is taught by the whole community.
--Plato
Believe you can and you're halfway there.
--Theodore Roosevelt
Everything Should Be Made as Simple as Possible, But Not Simpler
--Albert Einstein
The significant problems we face cannot be solved at the same level of thinking we were at when we created them.
--Albert Einstein
1 apple is not exactly 1/8 of 8 apples. Because there are no absolutely identical apples.
--Giordy
Post #1405517
fearghalreilly
fearghalreilly
Posted Thursday, January 10, 2013 9:32 AM
Forum Newbie
Group: General Forum Members
Last Login: Tuesday, January 15, 2013 10:16 PM
Points: 4,
Visits: 8
the test was for my semester 3 exams in college. These 2 questions that i posted didnt make much sense to me so I just wanted to know what others thought
Post #1405526
Abu Dina
Abu Dina
Posted Thursday, January 10, 2013 10:22 AM
SSC-Addicted
Group: General Forum Members
Last Login: Today @ 4:16 PM
Points: 494,
Visits: 2,151
fearghalreilly (1/9/2013)
i went with answer B but not fully sure if it was the correct decision ....
Sorry to say that you went for the wrong option!
B) de-normalization speeds up data modifications at the expense of data retrieval
When you de-normalise the data you're going to re-introduce some form of data redundancy. Which means modification would be applied to more rows (as data is now duplicated).
On the other hand, data retrieval would be faster when accessing correctly indexed de-normalised data.
BTW, when I read this earlier today I went for option E but like the rest I chose E because I didn't feel comfortable with the other options.
-----------------------------------
http://www.SQL4n00bs.com
Post #1405547
« Prev Topic
|
Next Topic »
14 posts, Page 2 of 2
««
1
2
Permissions
You
cannot
post new topics.
You
cannot
post topic replies.
You
cannot
post new polls.
You
cannot
post replies to polls.
You
cannot
edit your own topics.
You
cannot
delete your own topics.
You
cannot
edit other topics.
You
cannot
delete other topics.
You
cannot
edit your own posts.
You
cannot
edit other posts.
You
cannot
delete your own posts.
You
cannot
delete other posts.
You
cannot
post events.
You
cannot
edit your own events.
You
cannot
edit other events.
You
cannot
delete your own events.
You
cannot
delete other events.
You
cannot
send private messages.
You
cannot
send emails.
You
may
read topics.
You
cannot
rate topics.
You
cannot
vote within polls.
You
cannot
upload attachments.
You
may
download attachments.
You
cannot
post HTML code.
You
cannot
edit HTML code.
You
cannot
post IFCode.
You
cannot
post JavaScript.
You
cannot
post EmotIcons.
You
cannot
post or upload images.
Copyright © 2002-2013 Simple Talk Publishing. All Rights Reserved.
Privacy Policy.
Terms of Use.
Report Abuse.
