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Normalization
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Mike Is Here
Mike Is Here
Posted Wednesday, April 27, 2011 6:55 AM
Ten Centuries
Group: General Forum Members
Last Login: Yesterday @ 6:23 AM
Points: 1,331,
Visits: 433
Basic but very needed fundamental question
Post #1099380
Steve Jones - SSC Editor
Steve Jones - SSC Editor
Posted Wednesday, April 27, 2011 7:33 AM
SSC-Dedicated
Group: Administrators
Last Login: Today @ 11:20 AM
Points: 31,437,
Visits: 13,752
Richard Warr (4/27/2011)
Nice question and an interesting example. Would renaming the columns "Telephone 1" and "Telephone 2" to "Home Phone" and "Mobile Phone" mean that the table was then in 1NF?
I am not the db design guru, but from my understanding, that would be incorrect. The "use" of that property is different, but both home and mobile are the same type of property in relation to the entity.
Follow me on Twitter:
@way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
Post #1099418
Surii
Surii
Posted Wednesday, April 27, 2011 8:14 AM
SSChasing Mays
Group: General Forum Members
Last Login: Thursday, February 21, 2013 5:19 PM
Points: 658,
Visits: 455
Good question.
Post #1099485
SanDroid
SanDroid
Posted Wednesday, April 27, 2011 8:20 AM
Ten Centuries
Group: General Forum Members
Last Login: Thursday, January 31, 2013 8:01 AM
Points: 1,232,
Visits: 1,046
Nice question Steve.
We never have to guess or debate an answer with you.
Post #1099496
Steve Jones - SSC Editor
Steve Jones - SSC Editor
Posted Wednesday, April 27, 2011 8:24 AM
SSC-Dedicated
Group: Administrators
Last Login: Today @ 11:20 AM
Points: 31,437,
Visits: 13,752
SanDroid (4/27/2011)
Nice question Steve.
We never have to guess or debate an answer with you.
Ha! I've made plenty of mistakes and had some sketchy questions.
I am trying to get better and have learned to write questions that probe a bit without trying to trick someone.
Follow me on Twitter:
@way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
Post #1099500
SanDroid
SanDroid
Posted Wednesday, April 27, 2011 8:31 AM
Ten Centuries
Group: General Forum Members
Last Login: Thursday, January 31, 2013 8:01 AM
Points: 1,232,
Visits: 1,046
Richard Warr (4/27/2011)
Nice question and an interesting example. Would renaming the columns "Telephone 1" and "Telephone 2" to "Home Phone" and "Mobile Phone" mean that the table was then in 1NF?
No, but you could normalize the Phone number type.
Defining a table to store the repeating types of phone numbers.
You could start by adding another Table called Phone_Number_Types with an Id coulumn.
Then you could use a lookup table to match the repeating Phone_Numbers to the repeating Phone_Number_Types for each Employee.
Post #1099511
SanDroid
SanDroid
Posted Wednesday, April 27, 2011 8:36 AM
Ten Centuries
Group: General Forum Members
Last Login: Thursday, January 31, 2013 8:01 AM
Points: 1,232,
Visits: 1,046
Steve Jones - SSC Editor (4/27/2011)
I am trying to get better and have learned to write questions that probe a bit without trying to trick someone.
"without trying to trick someone"
That says it all.
If you are going to tell 70% or more of a community that they are wrong, you should never try to trick them.
Doing this could activate the kind of basic defense mechanisms that are counter productive to learning.
Post #1099517
mohammed moinudheen
mohammed moinudheen
Posted Wednesday, April 27, 2011 9:25 AM
SSCrazy
Group: General Forum Members
Last Login: Yesterday @ 7:43 PM
Points: 2,174,
Visits: 3,586
Nice question, testing our basics.
Mohammed Moinudheen
Post #1099577
Trey Staker
Trey Staker
Posted Wednesday, April 27, 2011 9:26 AM
Ten Centuries
Group: General Forum Members
Last Login: Wednesday, May 01, 2013 4:52 PM
Points: 1,379,
Visits: 2,626
Excellent question, Thanks!
---------------------------------------------------------------------
Use Full Links:
KB Article from Microsoft on how to ask a question on a Forum
Post #1099578
UMG Developer
UMG Developer
Posted Wednesday, April 27, 2011 10:20 AM
SSCrazy
Group: General Forum Members
Last Login: Monday, May 13, 2013 11:21 AM
Points: 2,163,
Visits: 2,148
Nice question, thanks!
Post #1099620
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