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3842681
Database Enviroment
Description
Part 2
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d
i
m
Mind Map by
yuroshyini1719
, updated more than 1 year ago
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Created by
yuroshyini1719
about 9 years ago
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Resource summary
Database Enviroment
ANSI-SPARC
American National Standards Institute, Standards Planning And Requirements Committee.
standard for DBMS
Levels
External
user view
Conceptual
community view
Internal
physical representation of DB
Advantages
customized user view
hides physical storage details from users
changes by DB admin doesn't effect user view
Data Model
documentation for data org.
Record- Based
Network
Hierarchial
Relational
Object- Based
Entity-Relationship
Functional
Object-Oriented
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