12 Questions
What is the fundamental concept of the CODASYL network model?
Pairwise sets representing owner and member record types
What are the key properties of relational tables?
Values are atomic, each row is unique, column values are of the same kind, the sequence of columns and rows is insignificant, and each column has a unique name
What does an object/relational database management system (ORDBMS) add to relational systems?
New object storage capabilities for managing complex objects like time-series, geospatial data, and multimedia
What technology do Object DBMSs enhance?
Object programming languages
What are some familiar query and procedural languages used in ORDBMSs?
SQL3, vendor procedural languages, ODBC, JDBC, and proprietary call interfaces
Which leading vendors are associated with ORDBMSs?
IBM, Informix, and Oracle
What is the main characteristic of the hierarchical data model?
Organizes data in a tree structure with parent and child segments
How does the hierarchical model link record types?
Through Parent Child Relationships
Why was the network data model developed?
To model many-to-many relationships in data
What is the basic data modeling construct in the network model?
The set construct
What concept is supported by the network model that allows a member record type to have multiple roles?
Multiparent concept
What organization defined the network model in 1971?
Conference on Data Systems Languages (CODASYL)
Test your knowledge on the hierarchical data model, which organizes data in a tree structure with parent and child segments. Learn about the structure of records, record types, and how it compares to the relational model.
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