Fundamentals of Database Systems (3rd Edition)

[Music] hello everyone and welcome back to the course of dbms in this video we will be looking into the fundamentals of database systems now let's go through the outlines of this video first we will be discussing about what a data model is and also its categories the first category of data model is the high level or conceptual data model then we have the representational or implementation data models and finally low level or physical data models and then we will be looking at few terminologies that we need to familiarize with so moving on first let us see what a data model is and why we require it one of the most important characteristics of database approach is that it provides data abstraction now what is data abstraction it is the hiding of complex details or details that are not needed by the database users now to achieve this data abstraction we have something called as data model