MI807: Database Systems for Managers Introduction –Course Goals & Schedule –Logistics –Syllabus Review Relational DBMS Basics –RDBMS Role in Applications –RDBMS Functions

Course Goals Database Management Concepts –Design, Capabilities, Limitations –Development Process –Business constraints Detailed knowledge of SQL “API” –Managing Data –Manipulating Data –Strong Focus on Reporting Database Application Development –Focus on procedures –Database-oriented web development

Logistics Webpage: www2.bc.edu/~spang Reference Material Syllabus / Schedule Access to the Oracle Software –Isqlplus.bc.edu –bcacad1 database instance Project Grading Labs

Syllabus / Sequence Purpose / Need BC Environment & Tools Logical design Physical design Data Management SQL Reporting Procedure development Data/Logic Security Data Integrity and Protection Web Application Environment

The DBMS in the Application Environment Web Server Client (Browser) Application Server DBMS Server “Jolt” browser SQLNet, ODBC,… Disk Storage “OS”

BC’s Oracle Software Host Database –Oracle Release 9i tools –BCACAD1 Instance (Rel 8.1) –Userids/passwords iSQLPlus on the web SQLPlus “Thick” Client –Universal Oracle client –Available on BC network SQLLoader HTMLDB –Oracle 10 App Development tool

Application Development Environment Network Servers Operating System/Subsystems Common System Utilities Common Business Code Application Specific Code

DBMS Application Advantages Single, consistent source of rules for accessing data Shared access for users, processes Insulation from data storage mechanics Increased granularity of access Integrity/recovery functions

The DBMS Server layers DBMS Storage Database Tablespace Table Tablespace Table DBMS Server Server Instance Schema Instance Schema “Mounts” Application Heavy Client sqlplus App Server Web Server isqlplus DBMS Client “Connects”

DBMS Architecture Disk Storage / File System DBMS Application –Server –Instance –Schema Logical Data Constructs –Tablespaces –Tables –Views Clients –SQLNet Heavy Clients –Web Clients

Data Integrity Locking –Allows simultaneous use –Different levels available Logging –Prevent partial updates –Recovery from failures Constraints –Limits on acceptable entries –Discussed in detail later Process

Data Security Granularity –Filter records –Filter columns Type of Access –E.g. read-only Multiple levels –Database –Table –Function Roles –Groups of privileges –Assignable to individuals

SQL API Defines command syntax –Data Definition –Data Manipulation –Session Management Open Standard Extensions for each vendor

Terminology Review Database Server Database Instance Schema Table-space Table View Column, Row Data type SQL Constraint

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