comp.databases Google Group

FilemakerMagic - Blog about tips and useful help on Filemaker

jose...@gmail.com — Sun, 07 Sep 2008 13:23:52 UT

I inform you that on the web
[link]
have a selection of good tricks in Filemaker.
I hope you like.
Javier

FAST '09 Call For Papers Deadline Approaching

l...@usenix.org (Lionel Garth Jones) — Thu, 04 Sep 2008 20:54:10 UT

The 7th USENIX Conference on File and Storage Technologies (FAST '09)
Program Committee would like to remind you that the deadline to
contribute to the refereed papers is quickly approaching. Paper
submissions are due 9:00 p.m. EDT, September 12, 2008.
FAST '09 brings together storage system researchers and practitioners to

Re: separate columns or separate table?

post.phil...@googlemail.com (Philipp Post) — Wed, 03 Sep 2008 10:30:35 UT

Frank,
There are no digits after comma, so I would rather see this as INTEGER
or CHAR(10) - depending on the requirements for your account number.
The later. Even first normal form requires the table to have a primary
key. You could not reliably access a row without and you can not
prevent duplicated insertions in that table destroying your query

Free Database Programs

ni...@nd.com (NewDatabases. com) — Wed, 03 Sep 2008 04:00:05 UT

Supports importing and exporting. Prints entire database or selected records. Self contained database.
[link]
Not impressed? Help us improve this database!
Send suggestions or requests for new or custom databases and be sure to include necessary field namess and field types.
Example:

Re: separate columns or separate table?

ge...@ocis.net (Gene Wirchenko) — Wed, 03 Sep 2008 00:30:56 UT

[snip]
It is not a number. Quick test: Do you ever perform arithmetic
operations on it? If not, it is a string.
One advantage that strings have over numbers is that leading
zeroes will not be suppressed. People with ZIP Codes starting with a
zero have been bit by this when trying to use Web pages. (If the

Re: separate columns or separate table?

frank.swarbr...@efirstbank.com (Frank Swarbrick) — Tue, 02 Sep 2008 21:12:58 UT

<ca6d100e-1b01-4d53-8942-40907 6bdc...@t54g2000hsg.googlegrou ps.com>,
Thanks for the comments, Philipp! I have a few comments on your comments.

Most of our account numbers are ten decimal digits, which is why I chose
this. What do you think is strange about it?
Mandatory as in "can't create the table without it" or as in "highly

Location Intelligence where to from here?

i...@yellowfin.com.au (Yellowfin Team) — Tue, 02 Sep 2008 13:14:21 UT

Most people have heard of location intelligence tools such as Google
Maps, or Geographic Information Systems (GIS). Indeed, mapping
technology is used everywhere and can be accessed easily online, from
a phone, and on the road. But can these applications be used
successfully in a business information and reporting context? The

Re: Data versioning for database entity?

shortcut...@googlemail.com (Robert Klemme) — Mon, 01 Sep 2008 17:05:14 UT

Both are viable options. You can even make user's life simpler with
option two by defining a set of views that always present the current
valid set of data only.
It probably depends on other factors which solution you pick. For
example, if you have a lot of versions you will end up with tables with

Data versioning for database entity?

dav...@dsl.pipex.com (davout) — Sun, 31 Aug 2008 12:18:25 UT

I'm looking for some help on how to design a schema that covers data
versioning on a database entity.
For example: there is a requirement for a database to store details of
a company's products for all staff to view. The 'product' entity
comprises of a main product table and multiple subordinate data tables

Re: separate columns or separate table?

post.phil...@googlemail.com (Philipp Post) — Fri, 29 Aug 2008 14:15:48 UT

Frank,
-- services used by customers by call
-- a customer can request for the account balance for all of his
accounts
CREATE TABLE Calltrak.Call_Segments
(call_id INTEGER NOT NULL
REFERENCES Calls(call_id),
service_code CHAR(1) NOT NULL
REFERENCES Services(service_code),
acct_nbr DECIMAL(10) NOT NULL -- decimal looks a bit strange for

Re: separate columns or separate table?

frank.swarbr...@efirstbank.com (Frank Swarbrick) — Thu, 28 Aug 2008 23:37:01 UT

<7b5644e4-96a2-4fa2-8b89-440eb 9c13...@c58g2000hsc.googlegrou ps.com>, Ed
one
I wouldn't say that each services is *performed* at most once per call.
Only that each services is *recorded* at most once per call. :-)
Actually, that isn't quite correct. The table is actually what we call
"call segments", where a "call" can consist of more than one call segment,

Re: separate columns or separate table?

butkus.jus...@gmail.com (Justas Butkus) — Thu, 28 Aug 2008 08:44:31 UT

Hello.
I should say sorry, if I get it wrong, but what about bit fields then?
You could store IDs in SERVICE_CODES table as a powers of 2 and then
store and retrieve them from SERVICES table using BITAND operation?
Not sure how this compares with relational databases theory, but it
just struck me as an idea...

Re: separate columns or separate table?

edproc...@gmail.com (Ed Prochak) — Wed, 27 Aug 2008 16:01:41 UT

On Aug 22, 1:26 pm, "Frank Swarbrick" <Frank.Swarbr...@efirstbank.co m>
wrote:
so each service is performed AT MOST once per call? looks like it
based on the COBOL
why the ID?? you don't need it!
The PK of this table should be (CALL_ID, SERVICE_CODE) Why add the
indirect ID column
Can you create a view with an INSTEAD OF trigger? (You failed to

Re: Problem in search when value contents single quote (') in where clause

erik.lennart.jons...@gmail.com (Lennart) — Wed, 27 Aug 2008 15:55:21 UT

Try:
babal''s First event
/Lennart

Re: continue to:DB2 from Yoav

shortcut...@googlemail.com (Robert Klemme) — Wed, 27 Aug 2008 06:17:25 UT

Frankly, this is the very moment where you should step back for a moment
and read some introductory material about relational databases in
general and DB2 in special. I am sure even DB2 documentation will
provide some sort of overview.
Cheers
robert