Ahmed Hussein Alywy
Abstract
Data reduction is the important thing in the real time database but theinformation in this data must not be changed. There are very huge data in thereal time system and all these data ...
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Data reduction is the important thing in the real time database but theinformation in this data must not be changed. There are very huge data in thereal time system and all these data must not be stored because the restrictionin storage media. The general method which is widely used is comparing therecent data with the previous data, if there is change in the value by a factoror large from this factor, the recent value is stored otherwise the current valueis not stored. Periodically (daily, weekly or monthly), the data is deleted ifthere is no need for to it. Here another suggestion is added to this methodaccording which pivot and critical points and specific factor specify the pointswhich can be deleted. This is done according to the increasing and decreasingin the values of data, and then the middle points can be deleted. This deleteddata can be retrieved mathematically approximately (near original data). Thismethod has been tested on real data and it’s successful.
