ON DUPLICATE UPDATE - Does not work

ON DUPLICATE UPDATE - Does not work

References

Reference NO 1

http://stackoverflow.com/questions/13008404/on-duplicate-update-does-not-work-for-unique-index

Reference NO 2

http://stackoverflow.com/questions/6724012/mysql-insert-on-duplicate-update-problem-with-primary-key

Reference NO 3

http://dev.mysql.com/doc/en/insert-on-duplicate.html

Reference NO 4

http://www.mysqlperformanceblog.com/2006/05/29/insert-on-duplicate-key-update-and-summary-counters/

Reference NO 5

http://dba.stackexchange.com/questions/47743/mysql-on-duplicate-key-update-does-not-work-with-specific-key

Reference NO 6

http://www.sitepoint.com/forums/showthread.php?838255-On-duplicate-key-Update-did-not-work

Reference NO 7

http://www.tokutek.com/2010/07/why-insert-on-duplicate-key-update-may-be-slow-by-incurring-disk-seeks/

Reference NO 8

#EANF#