How can the CODASYL framework correctly model a family tree, taking into account that every child has
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How can the CODASYL framework correctly model a family tree, taking into account that every child has to have (at least) two parents?
a. Use a set type “is parent of” between record types “parent” and “child”.
b. Use a dummy record type “is parent of” between record types “parent” and “child”.
c. List the parents as a vector in the data item set of every child.
d. We cannot model this constraint with the CODASYL framework.
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The correct option to model a family tree in the CODASYL framework considering that every child has ...View the full answer
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Related Book For 
Principles Of Database Management The Practical Guide To Storing Managing And Analyzing Big And Small Data
ISBN: 9781107186125
1st Edition
Authors: Wilfried Lemahieu, Seppe Vanden Broucke, Bart Baesens
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