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Introduction to Database Systems Module 1, Lecture 1

Database Management Systems , R. Ramakrishnan1 Introduction to Database SystemsModule 1, Lecture 1 Instructor: Raghu Management Systems , R. Ramakrishnan2 What Is a DBMS?vA very large, integrated collection of real-world enterprise. Entities ( , students, courses) Relationships ( , Madonna is taking CS564)vA Database Management system (DBMS) is asoftware package designed to store andmanage Management Systems , R. Ramakrishnan3 Why Use a DBMS?vData independence and efficient application development integrity and data access, recovery from Management Systems , R. Ramakrishnan4 Why Study Databases??vShift from computation to information at the low end : scramble to webspace (a mess!)

Database Management Systems, R. Ramakrishnan 5 Data Models A data model is a collection of concepts for describing data. A schema is a description of a particular collection of data, using the a given data model. The relational model of data is the most widely used model today.

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