Please give good for learning sql and pl/sql site

Hi All,
please give good reference site for learning sql and pl/sql, your suggestion would be appreciated.

http://tahiti.oracle.com/
http://www.oracle.com/pls/db112/homepage?remark=tahiti
http://download.oracle.com/docs/cd/E11882_01/appdev.112/e10766/toc.htm
http://download.oracle.com/docs/cd/E11882_01/server.112/e17118/toc.htm
http://download.oracle.com/docs/cd/E11882_01/appdev.112/e17126/toc.htm

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Catalogue of SQL and PL/SQL bad practices: Call for participation

I started compiling a list of Oracle SQL and PL/SQL bad practices, with the intention of producing a comprehensive catalogue of common and recurring programming mistakes, that can be used as a check-list for code reviews or given to junior developers. I have identified about 30 bad practices so far. For each bad practice, I provided a list of symptoms in the code, an explanation why it causes problems and a list of preferred solutions.
My goal with this list is primarily to start a discussion about similar recurring issues that other people have noticed. That discussion should lead to a more complete list which the community will then be able to use, hopefully, to learn something from the mistakes of others and to produce better code.
I would really appreciate your feedback - if you are interested in discussing these practices we can either do it in this forum, or start a separate mailing list.
You can download the first version of the catalogue in PDF form from http://gojko.net/effective-oracle
gojko adzic
http://gojko.net

exception handler (already covered), the philosophy
behind not using stored procedures, and having beenHi riedelme,
I'm not advocating not using stored procedures, but I am advocating not using exclusively stored procedures. I've seen that approach often, typically with people coming from SQL server or Oracle forms backgrounds, I never could understand the reasons behind it. Even for a simple select or update, they would write a stored proc that wraps the call and then require the client to execute a stored proc.
I think that views are much better for getting the data out of the database in general, and forcing people to use stored procedures with ref output cursors makes little sense. If the only possible interface is a stored proc, then one proc must be created for every required combination of data and every required filtering or grouping method, so there is much much more code in the database, and more code means harder maintenance.
If client apps can get data out using views, then they can join them with other views, filter or group the data as they require, which means that there is a lot less code in the database to maintain.
My other problem with stored-proc only approach is when people wrap simple insert/update/delete commands into a stored proc. Again, I'm not advocating using complex instead-of triggers to implement workflows and forcing people to use views, but I simply don't see any benefit of implementing a stored proc to do a simple update. I see a bad side of it because a stored proc needs to be implemented for every combination of columns that a client may need to update and every criteria that can be used for that. If a client is allowed to update a view, there is much less code in the database.
Views are, in my experience, also a lot easier to maintain and optimise without downtime because they can be revalidated without causing any problems to currently connected clients, where revalidated stored procedure or package will throw an exception the first time a connected client that had called it before calls it again.
If I'm missing something, please tell me. I'd really love to understand why someone would build a client API exclusively from stored procedures.
So far, I've been given explanations that it is for security purposes, or for performance. I don't know of any security restriction that can be implemented on a stored procedure or package that cannot be implemented with a view, and if bound variables and statement caching is used, sql statements don't suffer from sql injection and support pre-compilation.
Again, i'm not advocating throwing stored procs completely out, i'm against using them exclusively and throwing out any chance of SQL access.
gojko adzic
http://gojko.net

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How Can I get Interview Questions and answers for Oracle9i DBA and PL/SQL

How Can I get Interview Questions and answers for Oracle9i DBA and PL/SQL Programmer.

Please check the following link.
http://www.geekinterview.com/
-aijaz

How to learn SQL and PL/SQL ?

who can give me some useful advice about learning SQL and PL/SQL ?
who can help me?
thanks

Hi,
It's my opinion that you can pickup the PL/SQL language syntax /semantics from a book - but, to learn, you need to get real hands-on experience. You can get invloved in a Project that requires the use of PL/SQL & I am sure you can pick up the nuts & bolts from your experience.
You can read articles written by the SQL & PL/SQL gurus like Tom Kyte, Steven Fuernstein & the numerous Oracle ACE's - you do learn atleast a thing or two from every article.
If you have any specific questions about SQL & PL/SQL - you have come to the right place - you can post the questions here & the gurus will defenitely help you !
All the best !
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EF-s 50mm f/1.8 STM good for a "point and shoot" wife?

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NEED FOR INTERVIEW QUESTION SQL AND PL/SQL

I am finished Oracle 9i OCA.Pls Anyone help me.Interview Questions for SQL and PL/SQL.

Hi,
first of all, It is not the right place for this question. Better Google it and you will find hell lot of information over there.
Still, Give your email id, i will send you all the SQL/PLSQL interview question, I am having..
Thanks
KaMaL

Need objective sql and pl/sql question for preparing interview

Hey buddy please help me, now I am preparing interview of sql and pl/sql where asking objective question, so I need online site for preparing interview, your suggestion would be greatly appreciated.

Have you tried searching using one of the many Internet search engines?
I expect that there are many kinds of sites out there that may cater to you.
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Preparing for SQL and PL/SQL exam

Hello people...
I'm taking a preparation course for the Oracle DBA certification exam. I just finished preparing for the first exam -- SQL and PL/SQL.. The book I used for the course Oracle 8i DBA Certification Exam Guide as well as TEach yourself SQL in 21 days and Teach yourself PL/SQL in 21 days...
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Try going for the Exam Cram. The exam at the end of the book will definitely help a lot. The rest of the book might help, so just give it a try.
<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by Nosferatu:
Hello people...
I'm taking a preparation course for the Oracle DBA certification exam. I just finished preparing for the first exam -- SQL and PL/SQL.. The book I used for the course Oracle 8i DBA Certification Exam Guide as well as TEach yourself SQL in 21 days and Teach yourself PL/SQL in 21 days...
I'd say I'm prepared to pass the exam... Before I make my first attempt, I am thinking of going through the Exam Cram for the first exam. However, judging from the reviews on amazon.com, the book doesn't seem to be helpful...
Anyone have any tips or recommendations before I take the exam? Should I go through the Exam Cram? If not, are there better books to go through for last minute preparations?
Also, how many questions on the exam and what percentage do I need to pass?
Any input would be much appreciated... Thanks for ur help!<HR></BLOCKQUOTE>
null

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Hi Gurus,
I am looking for training slides or any other training materials for sql and pl/sql. Actually I have to provide a half/full day training to other people in my company.
If there is any link to get these docomentation it will be greate.
Your help will be higly appreciated.
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As it turns out , www.google.com will generally find you what you need.
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Materials for learning Enhancements and modification

Plz suggest the best free online materials for learning Enhancements and modifications.
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Moderator message : Search for available information. Read forum rules before posting. Thread locked.
Edited by: Vinod Kumar on Jun 29, 2011 11:25 AM

http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/EJBConcepts3.html
http://otn.oracle.com/sample_code/tech/java/codesnippet/j2ee/ejbbestpractices/ejb-best.html#pattern
http://java.sun.com/webservices/docs/1.0/tutorial/doc/JSPIntro.html
http://java.sun.com/j2ee/1.4/docs/tutorial/doc/index.html
http://home.cogeco.ca/~ve3ll/jstutor5.htm
http://www.pageresource.com/jscript/j_a_02.htm
I think will do

Please give good for learning sql and pl/sql site

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