ISQS Delgadillo Exam 3 TTU Study Guide with Complete Solutions
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Course
ISQS
Institution
ISQS
ISQS Delgadillo Exam 3 TTU Study
Guide with Complete Solutions
Data Resource Management - Answer--when you use technology to mange data.
Database Administrator (DBA) - Answer--Responsible for managing the data,
work with programmers and systems analyst to design and implement database.
-Also w...
-data dependence- when you change files you have to change program.
Database approach - Answer✔✔--when you need to change an address now just
change it on raider link. Its from one central location.
-files are consolidated into a common pool of records available to many different
application programs.
-requires the use of a database management system.
advantages of database approach - Answer✔✔--minimal data redundancy (data
duplication minimized)
data integration
-program-data independence (no data dependence)
hierarchal model - Answer✔✔-• data is organized in a top-down (inverted tree)
structure.
• Parent - child relationships
• one-to-many relationship (one parent, many children)
-problem with it is a parent can have many children but a child only has one parent.
(One to many relationship)
-One access path- one path to top and bottom element.
Network model - Answer✔✔--an extension of the hierarchical model.
-owner - member relationships
-Many to many relationships.
-a member may have several owners
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