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 32 of 46 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

Encapsulation

The internal structure of an object is hidden.

For example, all we know is that we can ask for the age, not whether the age is (1) periodically updated or (2) calculated on demand from birth date and current date.

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R. Funnell
Last modified: Wed, 2007 Mar 21 17:29:21

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