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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}
Write an sql statement to find what is the percentage of home policies which are from the state of Arizona out of all Home policies by Policy Value.
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The database files accept the actual data and are typically the biggest in size. Depending on their shape, the tables for all the user operation can go in one database file-but
PART MARKING: We will only mark TWO of the four questions below but you must submit answers to all four. We will choose the questions we mark randomly and we will supply you with
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how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
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