Health Records Analysis to build Final Patient dataset for dementia disease Big Data and data mining technologies are becoming an essential technology in everyday life. Banking use this tools to monitor the financial market through network activity monitors to minimize fraudulent transition. Automotive to reduce the implementation of opt having an underperforming market. The Healthcare sector, however, still has not benefitted from the wide-scale use of Big Data technologies. The reason for it is Healthcare sector has been traditionally slow in adopting new ICT techniques because most clinical data was stored in paper form. The distribution of Electronic health record (EHR) in healthcare facilities, it was an important step towards digitalization of health.