Basic Computer Notions Databases

Next Collections of data Reasons for a DBMS Reasons for a DBMS (cont'd) Database organization Flat databases Hierarchical databases Hierarchical example Hierarchical example (cont'd) Hierarchical example (cont'd) Hierarchical example (cont'd) Hierarchical example (cont'd) Hierarchical example (cont'd) Hierarchical example (cont'd) Hierarchical example (cont'd) Hierarchical example (cont'd) Hierarchical example (cont'd) Hierarchical example (cont'd) Hierarchical example (cont'd) Relational databases Operations on tables Relational examples Relational examples (cont'd) Relational examples (cont'd) Relational examples (cont'd) Relational examples (cont'd) Relational examples (cont'd) Relational examples (cont'd) Relational implementation Relational software 30 of 46 Abstraction Encapsulation Modularity Hierarchy Examples of class hierarchies Example of object hierarchy Events Object-oriented implementation Centralized databases Centralized databases (cont'd) Electronic Medical Records Electronic Medical Records (cont'd) Current efforts Current efforts (cont'd) Oacis DRG system

Object-oriented databases

Object-oriented analysis is another way to model the world, involving abstraction, encapsulation, modularity and hierarchy (with inheritance).

An object consists of data and methods.

Classes are used to group objects which have the same types of data and the same methods.

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Last modified: Wed, 2007 Mar 21 17:29:21

Slide show generated from dbms.html by Weasel 2007 Mar 21