Preventing 2 users from updating the same record simultaneously

Preventing 2 users from updating the same record simultaneously

References

Reference NO 1

http://stackoverflow.com/questions/11099890/2-users-updating-a-record-at-the-same-time

Reference NO 2

http://stackoverflow.com/questions/12302467/making-simultaneous-updates-by-multi-users-to-the-same-record

Reference NO 3

http://forums.devshed.com/php-development-5/a-common-scenario-multiple-users-updating-the-same-record-at-315265.html

Reference NO 4

http://pic.dhe.ibm.com/infocenter/cqhelp/v8r0m0/topic/com.ibm.rational.clearquest.admin.doc/topics/c_rec_lock_opt_pess.htm

Reference NO 5

http://forums.databasejournal.com/showthread.php?27692-Prevent-mult-users-from-editing-at-same-time

Reference NO 6

http://www.utteraccess.com/forum/Multiple-Users-opening-t1950523.html

Reference NO 7

http://en.wikipedia.org/wiki/Record_locking

Reference NO 8

http://bytes.com/topic/mysql/answers/77188-preventing-2-simultaneous-mysql-update-gui