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In a multiuser database environment, multiple simultaneous transactions may update the same data. Transactions executing simultaneously must produce meaningful and consistent results. In multiuser database environment conflicts are common. If conflicting situations are not dealt properly then it can harm the database. To minimize the concurrency problem the locking approach is used. Our study focus on implementation of optimistic lock through trigger on data objects of temporal database todoi:10.5120/ijca2016911214 fatcat:rg3ij2wh7fgbxhbqlvnlrwapoy