8 Chapter 8 The University Lab: Conceptual Design Verification, Logical Design, and Implementation Database Systems: Design, Implementation, and Management, Fifth Edition, Rob and Coronel

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 2 In this chapter, you will learn: How the Lab Management System modules are defined and refined How attributes and domains are identified and defined for each of the entities defined in the initial E-R model How the database transactions are identified and defined within the system modules That the design verification process uses modeling and normalization techniques concurrently to find and eliminate data redundancies Review the steps of database implementation Review the steps of database testing and evaluation Review the steps of database operation

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 3 Completing Conceptual and Logical Design Detail Matters! –Tasks Entity relationship modeling and normalization Data model verification Logical design Physical design Implementation Testing and Evaluation Operation –Primary modules Lab Management System Inventory Management System

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 4 Entities Identified Table 8.2

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 5 Completion of Conceptual Design Refine module definition –Entities –Attributes Normalization process –Discover new entities –Revise attributes

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 6 Lab Management System Module E-R Segment Figure 8.1

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 7 USER Entity Table 8.3

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 8 LOG Entity Table 8.4

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 9 LAB_ASSISTANT Entity Table 8.5

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 10 WORK_SCHEDULE Entity Table 8.7

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 11 HOURS_WORKED Entity Table 8.8

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 12 RESERVATION Entity Table 8.9

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 13 Revised RESERVATION Entity Table 8.10

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 14 RES_SLOT (Weak) Entity Table 8.11

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 15 Inventory Management Module E-R Segment Figure 8.9

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 16 INV_Type Entity Table 8.13

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 17 ITEM Entity Table 8.14

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 18 STORAGE Entity Table 8.15

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 19 LOCATION Entity Table 8.16

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 20 REPAIR Entity Table 8.17

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 21 VENDOR Entity Table 8.18

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 22 ORDER Entity Table 8.19

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 23 ORDER_ITEM Entity Table 8.20

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 24 WITHDRAW Entity Revision Figure 8.19

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 25 WITHDRAW Entity and Revision Table 8.21 Table 8.22

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 26 WD_ITEM (Weak) Entity Table 8.23

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 27 CHECK_OUT Design Revision Figure 8.22

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 28 CHECK_OUT Entity Table 8.24

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 29 CHECK_OUT_ITEM (Weak) Entity Table 8.25

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 30 E-R Model Verification Establishes –Design reflects end user views of database –Database transactions defined and modeled so design supports related requirements –Design meets output requirements –Design supports required input screens and data entry forms –Design flexible to support future enhancements Verification identifies –Central entity –Each module and its components –Each module transaction requirement

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 31 Inventory Management Reporting Problems Generates three reports; one is inventory movement report –Inventory movements spread across different entities –Difficult to generate output and reduces performance Item “quantity on hand” updated with different inventory movements –Purchase, withdraw, check-out, check-in, or inventory adjustment –Only withdrawals and check-outs represented in model

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 32 Inventory Management Reporting Problems Solution Create new entity as common movement entry point INV_TRANS created –Standardizes inventory module interfaces –Facilitates control and generation of required outputs

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 33 Inventory Transaction Process Figure 8.25

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 34 INV_TRANS Entity Table 8.26

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 35 TR_ITEM (Weak) Entity Table 8.27

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 36 Revised University Computer Lab ERD Figure 8.28

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 37 Logical Design Translates conceptual model to format for selected DBMS Sets stage for creating table structures, indexes, and views Table structures can be created with CREATE TABLE SQL commands Views created with CREATE VIEW SQL Commands Indexes created with CREATE INDEX SQL Commands

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 38 Physical Design Defines specific storage or access methods used by database Includes estimate of storage space Characteristics are function of DBMS and operating systems

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 39 Implementation Database administrator (DBA) –Controls database management function –Defines standards and procedures required to interact with the database –Adopts appropriate plan Plan elements –Definitions of processes and standards –Chronology of required activities Database creation Loading and Conversion –Documentation standards –Responsibilities for continued development and maintenance

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 40 Testing and Evaluation Determine how well database meets goals Ongoing process Considerations –Performance measures –Security –Backup and recovery procedures

8 Database Systems: Design, Implementation, & Management, 5 th Edition, Rob & Coronel 41 Operation Provides support for daily operations Maintains operational procedures Database maintenance and evolution –DBA performs technical and managerial duties to ensure proper operation of database to support organizational mission