RE: Best Practices on DB2 SQL Databases

For that, you can't beat Chris Date's book, "An Introduction to Database
Systems". He was the first guy to successfully interpret E. F. Codd's
"Relational Calculus" paper into a book. I'm sure it helped that Codd
and Date worked together. This book and Date's "Databases, Types, and
the Relational Model, The Third Manifesto" are the basis for DB2,
Oracle, MySQL, SQL Server, and many more of the modern relational
database systems.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Michael Ryan
Sent: Thursday, January 15, 2009 10:09 AM
To: Midrange Systems Technical Discussion
Subject: Re: Best Practices on DB2 SQL Databases

I think an issue is the whole mind set. Syntax is one thing -
understanding relational concepts, things like inner vs. outer,
cursors...things like that can be tough to get your head around. A good
SQL book (or some type of training) can be really valuable.

On Thu, Jan 15, 2009 at 10:50 AM, <rob@xxxxxxxxx> wrote:

As I've said, I've no problem with that, but don't stay there. Buy a
book and pursue other educational opportunities.

Heck, if you limited your sql knowledge to RTVQMQRY and STRSQL
prompter you'd never use a join - only a where clause.

Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From:
Vern Hamberg <vhamberg@xxxxxxxxxxx>
To:
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date:
01/15/2009 10:37 AM
Subject:
Re: Best Practices on DB2 SQL Databases Sent by:
midrange-l-bounces@xxxxxxxxxxxx



I cut my SQL teeth on interactive SQL in the early '90s - it's an
excellent tool for starting out, especially the prompting. Admittedly,
IBM have not updated it even to handle JOIN syntax, but I can live

with

that. At least once you put JOIN syntax in, it does recognize which
tables you are using, so you can get column lists.

Now Navigator has the tool for running SQL statements but I've not

seen

a decent prompter there yet - QBE is a fantastic help in MS Access

when

I continued to sharpen my teeth. Now things like SQL Server and mySQL
have tools that help you immensely - I do think IBM are a bit behind

in

this area - perhaps the Data perspective or QuantumDB can give us more
what is needed - I've not had to go either of those routes yet, but

they

are recommended - well, the Data perspective can be a dog if you don't
filter your connection enough!!!

So one can decry some of the simple tools, but there are still

beginners

out here who could well benefit from their use.

JMHO
Vern

DeLong, Eric wrote:

Scoff if you want, I really DID get my first exposure to RPG/400 by
reviewing Synon/2E generated code. What else is one to do? We were

a

S36 shop (in the sun-blasted wastes of west Texas) that bought into

the

Synon vision when moving to the AS400, though I was the only

developer

there to ever use it for a production application. No LUG, IBM was

60

miles away, no internet. Synon was the only tutor I had at the time,
and I was grateful to have that....

...Ah the memories,
Eric DeLong

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Walden H.

Leverich

Sent: Thursday, January 15, 2009 8:23 AM
To: Midrange Systems Technical Discussion
Subject: RE: Best Practices on DB2 SQL Databases

Doing the simple way is like saying you know RPG because you

generated

an inquiry screen from within a CASE tool like AS/SET once.

Well, I know RPG because I used Synon... so I'm good right? :-)

-Walden

--
Walden H Leverich III
Tech Software
(516) 627-3800 x3051
WaldenL@xxxxxxxxxxxxxxx
http://www.TechSoftInc.com

Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)
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