《信息技术和应用导论》影印版( computers,communications and information)ch12 files and databases.pptVIP

CHAPTER 12 FILES AND DATABASE;Main contents;Key terms(p12.30-12.32);Key terms(p12.30-12.32);12.1 All Database GreatSmall;Private database = shared database +distributed database A shared database is shared by users of one company or organization in one location A distributed database is one that is stored on different computers in different locations connected by a client-server network.;The Database Administrator;The Database Administrator;12.2 The database Storage Hierarchy the Key Field (p12.6);The data storage hierarchy;The Key Field;The second class;Key terms (p12.30-p12.32);Key terms (p12.30-p12.32);Key terms (p12.30-p12.32);12.3 File handling:Basic Concepts;Two Types of Data Files(p12.8);Batch Versus Online Processing(p12.9);Offline Versus Online Storage (p12.9);File Organization (p12.9-12.10);12.4 File Management System（p12.11）;Disadvantages of FMS(p12.12);12.5 Database Management System (p12.12);Advantages of a DBMS;Disadvantages of a DBMS;12.6 Types of Database Organization(p12.14);Hierarchical Database;Network Database;Relational Database;Object-oriented Database (OODBMS);12.7 Features of a DBMS(p12.18);Data Dictionary;Utilities;Query Language;Report Generator;Access Security;System Recovery;12.8 New Approaches:Mining,Warehouses,”Siftware”(p12.21);Data Mining;Preparing Data for the Data Warehouse;“Siftware” for Finding and Analyzing