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Is there a commercial RDBMS that allows one to create indices on views? I'm asking this partly because of BCNF. A typical BCNF problem is (where...
aehchua@ntu.edu.sg
01-16-2008 02:06 PM
TroyK Go to last post
16 122
"Joe Thurbon" <usenet (AT) thurbon (DOT) com> wrote I once wrote a little program to play Mastermind (a code guessing game) using entropy to...
David Cressey
01-12-2008 03:17 AM
David Cressey Go to last post
16 105
Hi I am trying to find out how you deal with variable prices, so when I query * I don't get * . Is there a rule of thumb for this type of...
graeme
01-11-2008 06:30 AM
David Cressey Go to last post
8 60
Hi, In the past I have always made the relationship between two tables using foriegn keys. So, to link employee to employer I would have a column in...
bissatch@yahoo.co.uk
01-10-2008 11:28 PM
David Cressey Go to last post
48 312
I need help in understanding what is an automorphism of a database instance. The following definition is from the book Relational Database Theory...
Kira Yamato
01-10-2008 09:25 AM
Jan Hidders Go to last post
124 830
Hello , can you help me please to analyse this situation and choose an appropriate design for that The prloblem /...
tears
01-09-2008 12:14 PM
rpl Go to last post
24 184
NULLs (Multi-page thread 1 2 3 4 5 ... Last Page)
What are NULLs for? Missing information? Then surely there should just be no tuple? To indicate that there can be no value? Why not a seperate...
stevedtrm
01-08-2008 02:20 PM
Sampo Syreeni Go to last post
332 5,020
Hello , can you help me please to analyse this situation and choose an appropriate design for that The prloblem /...
tears
01-08-2008 02:12 PM
TroyK Go to last post
16 147
I'm a newbie to dB programming. I set up a set of tables (see below after the RL signoff) to capture the relationship between a group of people...
raylopez99
01-01-2008 08:13 PM
Gene Wirchenko Go to last post
33 736
On 9 dec, 22:10, JOG <j... (AT) cs (DOT) nott.ac.uk> wrote: But that is what I'm saying, isn't it? These sets of properties are part of your model...
David Cressey
12-31-2007 07:48 PM
mAsterdam Go to last post
124 2,184
Hello: I am trying to learn SQL and RDBMS theories. To acheive this, I decided to assign myself a project. My project is basically, account for my...
magawake
12-27-2007 11:02 AM
Rob Go to last post
8 292
My beginner's book on RDBMS theory by Louis Davidson (APress) says that there's a trend towards using GUIDs (artificial keys) as computing power...
raylopez99
12-27-2007 05:13 AM
rpl Go to last post
19 386
On Dec 4, 6:13 pm, rp... (AT) pcwin518 (DOT) campus.tue.nl (rpost) wrote: Fair enough :) I still think if you examine this again you'll see it...
Phil Reynolds
12-26-2007 11:54 AM
JOG Go to last post
168 2,881
I'm getting the hang of database architecture design I think, along with easy to code, drag-and-drop Access 2003 forms programming--great front...
raylopez99
12-26-2007 02:43 AM
rpl Go to last post
31 757
It's time for me to ask another dumb question. The term "data sublanguage" appears in Codd's 1970 paper. I kind of glossed over it when I first...
David Cressey
12-25-2007 11:10 AM
Knowledgy Go to last post
5 326
http://www.idera.com/Simon/ How would you like Simon's job?
David Cressey
12-22-2007 06:45 AM
Tony Rogerson Go to last post
4 318
Just wondered if anyone had seen this: http://www.regdeveloper.co.uk/2007/12/17/amazon_simpledb/ While in principle a globally accessible database...
JOG
12-21-2007 07:56 PM
Lon Stowell Go to last post
9 312
sorry to bug you but... if i want to define a datum in terms of who owns what, what branch of IM is it ? (yes i know it's not a computer-bound...
rpl
12-19-2007 10:41 PM
rpl Go to last post
2 302
Suppose I want to create a schema for S = student, J = subject, T = teacher, that enforces 1) For each subject, each student taking that subject is...
Kira Yamato
12-15-2007 06:42 PM
Brian Selzer Go to last post
10 521
OK, this is about my fifth day doing databases, and I've read about 1NF, 2NF, 3NF here:...
raylopez99
12-15-2007 09:48 AM
raylopez99 Go to last post
10 465
Hi, It seems to be a common enough problem, but it doesn't seem to ever be properly addressed in data modelling books, and from reading on the web...
d-42
12-14-2007 05:51 PM
-CELKO- Go to last post
6 313
raylopez99 wrote: You are confusing logical and physical issues. For example, if all of the 'dependent' or 'downstream' relations are physically...
Bob Badour
12-14-2007 03:40 PM
Bob Badour Go to last post
2 320
In paper "Independence of Logic Database Queries and Updates" by C. Elkan it is proven that for logical databases query independency from updates...
silentser@gmail.com
12-14-2007 09:23 AM
silentser@gmail.com Go to last post
4 378
On Dec 6, 7:54 pm, paul c <toledobythe... (AT) ooyah (DOT) ac> wrote: Well, if nothing else, we can certainly consider relation constants. DUM and...
Tegiri Nenashi
12-12-2007 07:17 PM
V.J. Kumar Go to last post
28 508
http://www.amazon.com/Handbook-Relational-Database-Candace-Fleming/dp/0201114348/ref=pd_bbs_sr_1?ie=UTF8&s=books&qid=1197329088&sr=1-1 I know this...
Evan Keel
12-12-2007 06:18 PM
Brian Selzer Go to last post
5 342
Valentina Office Server, Valentina Embedded Server and the free Valentina Community Server for Linux now support custom database properties, some of...
Lynn
12-07-2007 04:57 PM
Bob Badour Go to last post
1 252
On 6 Dic, 17:21, paul c <toledobythe... (AT) ooyah (DOT) ac> wrote: thank you for answering. so, you're saying that, for instance, the effective...
xareon@gmail.com
12-06-2007 05:20 PM
Jonathan Leffler Go to last post
2 277
paul c wrote: I like the "relvar" entry in Wikipedia. Short, but sweet. -- Reinier
David Cressey
12-06-2007 01:26 PM
rpost Go to last post
26 688
paul c wrote: There was a typo in the postal code: H0H 0H0
M.Shariq
12-04-2007 07:31 AM
floronDBA Go to last post
4 282
"paul c" <toledobythesea (AT) ooyah (DOT) ac> wrote A database derived from census data might be about two different subject matters: The first is...
David BL
12-04-2007 04:51 AM
Jan Hidders Go to last post
88 1,394
I'm hoping that someone here can give me some assistance with a database I'm trying to set up. My skills in Access are fairly basic, and I'm trying...
Jeffrey Davis
12-03-2007 08:29 AM
David Cressey Go to last post
13 649
"paul c" <toledobythesea (AT) ooyah (DOT) ac> wrote You jumped in with an attempt to ridicule my (correct, I might add) use of the term...
vldm10
11-30-2007 10:25 AM
JOG Go to last post
50 1,173
On Nov 23, 1:10 am, paul c <toledobythe... (AT) ooyah (DOT) ac> wrote: I understand your point Paul, although I deliberately omitted the whole...
JOG
11-28-2007 06:00 PM
Cimode Go to last post
17 482
If I wanted to start investigating encrypted databases and built-in support for encrypted content in databases, where might I go? I'd prefer to...
Roy Hann
11-26-2007 01:54 PM
Bob Badour Go to last post
6 304
Give me advise please, from what I can start learning database theory?
mp5.misha@gmail.com
11-17-2007 06:43 PM
JAK Go to last post
2 310
On Nov 12, 9:42 pm, paul c <toledobythe... (AT) ooyah (DOT) ac> wrote: No I am saying that too many new Relational Database developeres...
David BL
11-13-2007 06:33 PM
David BL Go to last post
91 1,664
I get XML feeds as input and have to store this data on our server. I have worked with databases but new to XML. Can someone tell me how I can store...
karsoods53
11-11-2007 10:44 AM
Bob Badour Go to last post
33 768
Quoth paul c: What do you mean? That an RVA might have an attribute with the same name as an attribute in the enclosing relation? If you think of...
Bob Badour
11-07-2007 02:13 AM
Jon Heggland Go to last post
59 1,387
This e-book contains over 1,100 pages of information that establish a new paradigm for the integrated Enterprise Data Architecture. It is...
Parker
11-04-2007 04:21 AM
Roy Hann Go to last post
14 434
Hi all, I know it is an old issue and probably boring but please cope with me , it is a real world problem I am facing and I don't really...
Arash
10-31-2007 08:29 AM
Arash Go to last post
2 286
paul c wrote: "Keeping up Appearances" - quite apt for this thread! Especially given the surname is pronounced "bookay" (aka bouquet). Classic...
anjasmedts@hotmail.com
10-31-2007 04:27 AM
Authorised User Go to last post
20 329
Hi all, Let's suppose I'm writing a website where users search for movie titles, and suppose there are 200,000 movies. The site is in...
crazyhorse
10-25-2007 10:06 AM
Patricia Shanahan Go to last post
6 134
In An Introduction to Database Systems, C.J. Date, characterises value, variable and type as follows:- "value" : An "individual constant" - for...
David BL
10-24-2007 10:33 PM
David BL Go to last post
2 137
DB layout is as follows: -------------------------------- 1 ------------------------------- 1
dutone
10-24-2007 12:52 PM
Cimode Go to last post
32 439
"paul c" <toledobythesea (AT) ooyah (DOT) ac> wrote My use of the term "header" might be non-standard. for Table B and for Table C are what I...
Roy Hann
10-19-2007 09:21 AM
Dr. Dweeb Go to last post
26 359
I just got a new job (woohoo). First challegne I face is to build a data model and a data dictionary of all the systems existing in the organisation....
nujcharee@googlemail.com
10-18-2007 11:06 PM
Ed Prochak Go to last post
1 234
On 14 oct, 04:43, paul c <toledobythe... (AT) ooyah (DOT) ac> wrote: involve more than one per relation but the other complications will attract...
Cimode
10-14-2007 11:31 AM
Cimode Go to last post
6 121
I never really took any effort to bother to know what these are until they got in my way in otherwise fine...
Tegiri Nenashi
10-12-2007 02:33 PM
Bob Badour Go to last post
1 129
While working on a db core on these last years, one of the question that gave me most difficulty was what would be an efficient taxonomy to list...
Cimode
10-08-2007 01:36 AM
Jon Heggland Go to last post
4 138
I have a set of predefined constants with a set of predefined relationships and am looking for a way to link them if possible to ensure data...
JamesHoward
10-06-2007 01:55 PM
David Portas Go to last post
5 143
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