Selected Topics on Databases n Multi-User Databases –more than one user processes the database at the same time n System Architectures for Multi-User Environments –Teleprocessing Systems (Fig pg.278) Uses one computer and one CPU

–Client-Server Systems (Fig.12-2 pg. 279) Multiple computers connected in a network Some computers process application programs (clients) Another computer processes the database (server) –File-Sharing Systems (Fig.12-3 pg.280) The server is a file-server not a database server Use LANs of microcomputers –Distributed Database Systems (Fig.12-4 pg.281) The database itself is distributed to different computers

n Data Warehouses –A store of enterprise data that is designed to facilitate management decision making. –Includes data, tools, procedures, training, personnel, and other resources for accessing data. –Data Warehouses Vs. Downloading data