References
Reference NO 1
http://stackoverflow.com/questions/607264/how-can-i-count-the-numbers-of-rows-that-a-mysql-query-returned
Reference NO 2
http://stackoverflow.com/questions/15203206/mysql-calculate-number-using-count-within-the-select-statement
Reference NO 3
http://dev.mysql.com/doc/refman/5.1/en/counting-rows.html
Reference NO 4
http://www.w3schools.com/sql/sql_func_count.asp
Reference NO 5
http://www.mysqlperformanceblog.com/2007/04/10/count-vs-countcol/
Reference NO 6
http://php.about.com/od/mysqlcommands/g/sql_count.htm
Reference NO 7
http://www.tutorialspoint.com/mysql/mysql-count-function.htm
Reference NO 8
http://www.sitepoint.com/forums/showthread.php?216548-conditional-COUNT-in-MySQL
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