--------------- " PUNTER:       Good morning.
Glossary 0.0.4:   RECEPTIONIST: Good morning, sir. Can I help you?
june 16, 2004     PUNTER:       Well, I'd like to have an argument,
---------------                 please."

I am searching for a simple example of the
Division as in relational algebra.
(Operations : Union, intersection, difference, cartesian product,
selection, projections, join and DIVISION).

Over in news:comp.databases  there is a thread where what's being discussed
is a product called "Cache".  Among the things it's being called is
"post-relational".  Somewhere in the discussion,  it says that Cache has
historical roots in MUMPS,  and that MUMPS is multidiminsional.

When one wants to express a cardinality constraint on one item
vs. another, being able to do it structurally is the best approach.
The most basic example is one-to-many. If, for each a in A, you
have 0 or more b in B, then have B have, in addition to its own

 I am facing a problem in righting a query. I am not able to get the
desired results that I want. Following is the description of the
problem:
I have two tables:

Here's my list of the top ten stupid database tricks:
10.  We never defragement the disks that hold the database files.  Data
might get corrupted!
9.  We know that indexes speed things up.  So every column has an index!

--- Jim Kraai <jim.kraai@computility.com> wrote:

This is a question out of Database System Concepts by Silberchatz.
Consider the following two transactions, T1 and T2
T1: read(A)
   read(B)

If  tuples in a relational relation(ship) (or relvar) are propositions, what
is the meaning of :
select count(distinct *) as nr

I have an application which tracks backed up files using a very simple
schema:
table session(sess_id, date,totalsize)
table files(filename,size,date, sess_id)

Extreme Programming methodology/ies has a process for determining what data
from the problem domain is modeled today and what is left for future phases
of any project. The rule of thumb is that only the data required to meet the
user requirements for this specific iteration (this ...

I need to create a database for my company. We build machines and so we have
a part list of the components.
I have created a model of the machine in which there is a list of components
to be filled in order to complete the design scheme.

http://web.inter.nl.net/users/T.Koppelaars/
Regards
 Alfredo

x wrote:

We are currently in the process of developing a client/server based
generic tree application with which we want to be able to model and
render any size, shape and depth of tree.
Our primary objective is to provide the ability to model large data