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) 18 of 46 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 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

Hierarchical example (cont'd)

Sample hierarchical database

Question #2: How many babies with birth weights > 2.5 kg have been delivered by each physician?

We've had to read 17 records in all, including all the mother records (which we weren't really interested in).

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

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