Commit/Roll Back Transaction in PHP/mySQL

Glory! Im creating a .php file that will be uploading & putting in data from a .csv file into mySQL Tables on the server. However, my problem is that if there is any kind of a problem during the transaction, i.e, system shut down, electricity problem, or any reason why the transaction is interrupted, i would like the transaction to roll back.. that is, all the records entered before the interruption SHOULD NOT remain in the database, they should get deleted or something, so that the transaction can begin Fresh from next time. How can i make such a function that will see this happens, in my PHP/mySQL. Thanks, T. Edison Jr. __________________________________________________ Do You Yahoo!? Sign up for SBC Yahoo! Dial - First Month Free http://sbc.yahoo.com