TAILIEUCHUNG - Bài giảng Cơ sở dữ liệu nâng cao - Chapter 1: Creating databases and database files

Bài giảng Cơ sở dữ liệu nâng cao - Chapter 1: Creating databases and database files. Nội dung chính trong chương này gồm có: Introduction to database, creating database, managing database, maintainance to database. . | Chapter 1 Creating Databases and Database Files 9/25/2011 1 Agenda Introduction to database Creating database Managing database Maintainance to database 9/25/2011 2 Database Database: A collection of data that are related in a meaningful way, which can be accessed in different logical orders Database Management System (DBMS): A general purpose software package designed to store and manage database 9/25/2011 3 Simplified database system environment 9/25/2011 4 Database example A UNIVERSITY database for maintaining information concerning students, courses, and grades in a university environment We have: STUDENT file stores data on each student COURSE file stores data on each course SECTION file stores data on each section of each course GRADE_REPORT file stores the grades that students receive PREREQUISITE file stores the prerequisites 9/25/2011 5 Database example 9/25/2011 6 Database example 9/25/2011 7 DBMS Objectives of DBMS: Data availability: users can easily access the data. Data integrity: the data available in the database is a reliable data Data security: only authorized users can access the data. Data Independence: the user to store,update, and retrieve data in an efficient manner. 9/25/2011 8 Three-Schema Architecture Defines DBMS schemas at three levels: Internal schema at the internal level to describe physical storage structures and access paths ( indexes). Conceptual schema at the conceptual level to describe the structure and constraints for the whole database for a community of users. External schemas at the external level to describe the various user views. 9/25/2011 9 Three-Schema Architecture 9/25/2011 10 Introduction to SQL Server 2008 MS SQL Server is a Relational Database Management System (RDBMS) designed for use in a network environment. RDBMS is system for storing, manipulating data in a series of related table. 9/25/2011 11 Introduction to SQL Server 2008 MS SQL Server supports 2 computing models: Client/server application model: 9/25/2011

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