| Thread | Last Post | Replies |
|
| Query Dependency | 29 Feb 2008 09:45 GMT | 1 |
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 GMT | 261 |
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 0.1.3 | 17 Feb 2008 22:50 GMT | 5 |
--------------- Glossary 0.1.3 "You keep using that word. I do not think it means january 2008 what you think it means"
|
| Normalizing Tree Data | 13 Feb 2008 04:15 GMT | 13 |
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 GMT | 4 |
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 Expression | 10 Feb 2008 03:10 GMT | 9 |
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 GMT | 11 |
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 Design | 09 Feb 2008 02:41 GMT | 127 |
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 Question | 08 Feb 2008 22:48 GMT | 10 |
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 Modeling | 08 Feb 2008 19:31 GMT | 3 |
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 notation | 08 Feb 2008 17:06 GMT | 8 |
Marshall wrote:
> Brass tacks: > > X(x) -- the domain |
| tups_per_page | 08 Feb 2008 13:45 GMT | 2 |
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 atomic | 05 Feb 2008 10:54 GMT | 22 |
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 possreps | 04 Feb 2008 12:52 GMT | 3 |
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
|