References
Reference NO 1
http://stackoverflow.com/questions/15204968/order-of-where-clause-is-affecting-result
Reference NO 2
http://stackoverflow.com/questions/4035760/does-the-order-of-fields-in-a-where-clause-affect-performance-in-mysql
Reference NO 3
http://dba.stackexchange.com/questions/1792/in-mysql-does-the-order-of-the-columns-in-a-where-clause-affect-query-performan
Reference NO 4
http://www.bigresource.com/MS_SQL-Rank-and-using-WHERE-clause-on-results-Zsxlnb2U.html
Reference NO 5
http://blog.sqlauthority.com/2009/03/15/sql-server-interesting-observation-of-on-clause-on-left-join-how-on-clause-effects-resultset-in-left-join/
Reference NO 6
http://docs.doctrine-project.org/projects/doctrine1/en/latest/en/manual/dql-doctrine-query-language.html
Reference NO 7
http://dev.mysql.com/doc/refman/5.0/en/group-by-extensions.html
Reference NO 8
#EANF#
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