A design problem in my organization similar to the following has
arisen.  (The example below is a bit contrived, as I would prefer not
to discuss our exact situation).
Say that, once a month, a bowling alley employee enters league players

Could some kind person please help with a little Database Design
problem I've come up against?
I am in the process of designing a football online management system
with which I intend to display results fixtures etc. My dilemma is I

If I use like and I want to find all emails in hotmail that have at
least one char before the '@' and after the '.'
Is this the right command
where EmailAddress like '%_@hotmail._%'

Some thoughts on attribute names.
A common response to inexperienced database developers who post DDL or
pseudo-DDL is that they have mixed up the physical model with the
logical model, or the logical and conceptual model, because they have

Can anyone tell me if I'm going in the right direction with this EER
Diagram and point to any improvements I could make?
Thanks in advance
We have been given this problem to do:

Just wondered, what is the difference between a cardinality ratio
constraint and a structural constraint?
Is, a cardinality ratio like 1-to-many, 1 to 1 etc..
and

A design problem in my organization similar to the following has
arisen.  (The example below is a bit contrived, as I would prefer not
to discuss our exact situation).
Say that, once a month, a bowling alley employee enters league players

Jim or anyone else involved in PIck for Cache' -- will the Cache'
product have functional DataBASIC or multivalue query languages any
time soon?  When will it make sense for this product to be included in
the MV Family Tree?  Is there a name for it separate from Cache'?  Is

I have a question to the Relational Model and the definition of
relations and tuples.
I learned the following definitions:
A relation schema R is a set of Attributes R={A_1,A_2,...,A_n}

[[[Hierarchy as 'UP' constraint]]]
Many articles (in c.d.t. and elsewhere) and even a
book (Joe Celko's “Trees and hierarchies in SQL for
smarties“) have been written about hierarchies and

With all this nullvel (sic) gazing I got to wondering where the "Trans
Relational Model" is these days?
Curiously it did seem much like the Sybase IQ product (on a superficial
examination only) - accordingly does the "patent" have prior art problem

Is there a reason why we have to pay more for licensing for a different
kind of processor?
Why are we not charged for the Hyperthreading on some processors also.
If Oracle is really conserned about the low end business market (small

Are you aware of any SQL DBMS in which "with check option" constraints can
be deferred ?

Can someone give me a link for a full proof or something?
Thanks

Suppose a RDBMS has a catalogue with schema
Relations (Name) with key (Name)
Fields (RelationName,FieldName,FieldType) with key
(RelationName,FieldName)