![]() in past,later we used punched cards technology was used to store data.but the files have no such advantage,rather have several limitations.ġ968-1980 Era of Hierarchical Database Prominent hierarchical database model was IBM’s first DBMS called IMS(Information Management System). ![]() Evolution of Database Management Systems From earlier stage flat-file system, to relational and object-relational systems, database technology has gone through many generations and its history that is spread over more than 40 years now.ġ968 file based Predecessor of database,data was maintained in a flat file.
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