How things work : SQL Select Statement

Ever asked your self how things work inside the SQL Select statement? In this article we won’t be talking about how to write SQL Select statement but rather we will be talking about the algorithms and the methodology behind the Select statement and how SQL decides which algorithm it will use to filter out the results and return our expected results.

read more : http://javalandscape.blogspot.com/2010/01/how-things-work-sql-select-statement.html