Introduction to SQL by Phil Spector
This note covers the following topics: Multiple simultaneous changes to data, Uses of Databases, Ways to Use SQL, Some Relational Database Concepts ,Variable Types, CREATE TABLE statement, Entering observations into a table, Comparison Operators, Updating a Table , The SELECT statement, Selecting based on Summaries, Subqueries, Making Tables from Queries, SELECT with multiple tables.
Author(s): Phil Spector
165 Pages 
What every developer should know about SQL performance
This book covers everything developers need to know about indexes and nothing more. To be more precise, the book covers the most important index type only: the B-tree index. The structure of the book is tailor made for developers; most chapters correspond to a particular part of an SQL statement.
Author(s): Markus Winand
NA Pages
Information Modeling (D. Edmond)
We are working on the detailed description of this book, we will update this section soon.
Author(s):
Pages
