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What is completeness constraint on generalization? Define the variation between total and partial design constraint. Give an example each.
Ans: Completeness Constraints
1. Total specialization constraint
a. Each entity in the superclass should be a member of some subclass in the specialization for example {HOURLY_EMPLOYEE, SALARIED_EMPLOYEE}
b. Notation: superclass
2. Partial specialization constraint an entity might not belong to any type of the subclasses
For example: {SECRETARY, ENGINEER, TECHNICIAN}
A student entity type has the following attributes,name..
A relationship set is a set of relationships of the similar type. For example, let consider the relationship among two entities sets course and student. Collection of all the in
Attributes and its types explain?
Describe different steps of the object-oriented design process. The broad steps of the object-oriented design process are: a. Define context and modes of use of the system
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In a relational model how relations are termed? In a relational model, relations are termed as tables. (The term ‘relation’ is the technical name of the ‘table’ in RDBMS)
What do you understand by transitive dependencies? Define with an example any two problems that can take place in the database if transitive dependencies are available in the datab
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