Sams teach yourself PL SQL in 21 days is better than these books

Though sams is a old book, and it some points it needs the explanation from another great book Rampant Press Easy Oracle PL SQL Jumpstart but to learn pl sql it is better than :

Oracle PL / SQL Programming (Animal Guide) by Steven Feuerstein

Oracle Database 11g PL / SQL Programming (O... by Michael McLaughlin

Oracle Database 10g PL / SQL Programming by Scott Urman


Oracle PL / SQL For Dummies by Michael Rosenblum

Beginning PL / SQL: From Novice to Professional (... by Donald Bales

Oracle PL / SQL by Example (4th Edition) by Benjamin Rosenzweig 

  

Oracle SQL high performance tuning by Guy Harrison is the best Oracle book

Oracle SQL high performance tuning by Guy Harrison
Later in Sept 19 2009, I read this book is like the best Oracle book i have read, it clears up concept better than the art and science of Oracle performance tuning. I read it very smoothly. I read it like a oracle bible now.

Sams teach yourself in 21 days by Johnathan Gennick is the best PLSQL book i have ever read

I was looking for Oracle PLSQL program units exam guide in Jurong East Regional library in Singapore and it was on loan, and i found the above two great books.
The Sams teach yourself PLSQL in 21 days by Johnathan Gennick is probably the best PLSQL book i have ever read though it is not very famous and uses oracle 8i but i cant put the book down, it step by step explanation has cleared a lot of doubts in my mind even the Rampant book Oracle PLSQL jumpstart didnt really clear. I cant put the book down.But the book is written by two authors, John is probably very good the other one probably not that good, read the reviews of Amazon.

I am in chapter 3 now. cant put the book down

Reading Oracle SQL high performance tuning like reading magazine

Flipping here and there non sequentially; the way it is meant to be read.

What is Oracle like?

It is like car tuning but better. 

http://www.cartuningcentral.com/

Oracle SQL High Performance tuning by Guy Harrison - very good book

It cannot be use as a first book. But on second read, it is actually a very good book, simple prose and clear away some concepts i have on indexing. Could be used as a main sql tuning book.