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Database Forum / General DB Topics / DB Theory / February 2008

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ThreadLast Post  Replies
Query Dependency29 Feb 2008 09:45 GMT1
My current research leads me to the problem of analysis the dependency
between 2 database query.
For example: There is an UPDATE query and then a SELECT query.
My system have to automatically detect whether the SELECT query result
Newbie question about db normalization theory: redundant keys OK?18 Feb 2008 19:28 GMT261
With a few hours of theory under my belt, I'd like to ask if there's
ever a time that you don't want a completely normalized dB, that is, a
normalized database being a dB that has no redundant information (my
understanding of what a normalized database is).
cdt glossary 0.1.317 Feb 2008 22:50 GMT5
---------------
Glossary 0.1.3               "You keep using that word.
                              I do not  think it means
january 2008                  what you think it means"
Normalizing Tree Data13 Feb 2008 04:15 GMT13
What's the simplest way to set up a relationional database with tree
data? I'm more interested in simplicity vs speed.
Suppose you have a tree database with 3 levels. Company-Division-
Manager. Like this:
"Master Data Management?"12 Feb 2008 19:49 GMT4
A new buzzword seems to have crept up on me when I wasn't looking --
I'm seeing a lot about "master data management" (http://
en.wikipedia.org/wiki/Master_Data_Management) as somehow a different
(or more specialized?) discipline than plain 'ole "data management".
Relational Algebra Expression10 Feb 2008 03:10 GMT9
I've been trying to figure out how to use relational algebra to
extract some data from the following relation:
<Year, Name, Votes> where the primary key is Year+Name (composite
key). A sample table could contain the following entries:
A research effort on a computing model...09 Feb 2008 12:31 GMT11
On the last years, I have been putting some modest but consistent
effort to build a computing model whose principles, I embodied under
the form of a db core that allows relation definition and manipulation
as well as basic relational operations.
Principle of Orthogonal Design09 Feb 2008 02:41 GMT127
I was wondering what your current stances towards the principle of
current design is cdt - info about the POOD is actually pretty sparse
on google, which has not helped my own understanding. I gather that
Date has realigned his opinion - although what to I know not - and
2nd Normal Form Question08 Feb 2008 22:48 GMT10
I'm currently evaluating whether a relation is in 2NF. The relation is
defined as follows:
<Year | Winner Name | Winner Votes | Party | Home State> in the
context of an election. I've given a sample relation below.
Data Modeling08 Feb 2008 19:31 GMT3
The following is a technical report on a data modeling project
that was recently assigned to me by my professor. I post it
so that anyone else who is studying databases and data modeling
can have an example to go by with their study of databases.
RL notation08 Feb 2008 17:06 GMT8
Marshall wrote:
> Brass tacks:
>
>   X(x)  -- the domain
tups_per_page08 Feb 2008 13:45 GMT2
Marty:
A few months ago you and Andrew Ross were kicking around a correction to the
way tups_per_page is calculated for the iitables view.  Did you ever get
that working properly?   And did you test it to see what happens if you
Towards a definition of atomic05 Feb 2008 10:54 GMT22
AFAIK the conventional wisdom is that no absolute definition of atomic
exists for domain types.  Throwing caution to the wind, in this post I
wish to conjecture a definition of atomic that, perhaps with some more
effort at its formalisation, can provide some absolute meaning for a
an idea about possreps04 Feb 2008 12:52 GMT3
I just had this idea about possreps.
In another context, someone discussing methods, or functions
that are bound very closely to a specific type, commented
that he thought that such functions should be extremely
 
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