Table of ContentsAdvanced Object Concepts: Objects and Databases Objects and Databases: Course Outline Mapping Objects to a Relational Database is the most common approach today Every OO Toolset provides some Classses that map onto the Relational DBMS constructs Wrapping the database keeps the impedence mismatch between Objects and SQL Delphi Components were designed for GUI presentation of Database Entities A common mistake is to use the Data Model as the Object Model Successful mapping of Objects to Relational Databases requires understanding of both Generation of Object Identifiers Generation of Object Identifiers Generation of Object Identifiers Mapping Objects to Relational databases is relatively simple Object Attributes map to zero or more Columns Classes map to Tables Comparing Mapping Strategies Mapping Relationships looks similar to the relational model, but there are differences When Mapping, remember to avoid hardcoding the table and column names Database Views are an alternative mechanism for mapping with name independence The practice of interfacing Objects to Relational Databases is still evolving A Database Management System provides many facilities to applications Summary so far: Most OO Tools provide relational mapping |
Author: Bill Ross
Email: wnross@home.com |