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 Object-oriented databases Abstraction Encapsulation 33 of 46 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

Modularity

Grouping classes and objects into ‘cohesive and loosely coupled modules’.

For example, the classes person and cat might be implemented within the same module because they share many things (like how to calculate age).

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

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