Question: Figure shows a lattice structure of generalization and specializ
Figure shows a lattice structure of generalization and specialization. For entity sets A, B, and C, explains how attributes are inherited from the higherlevel entity sets X and Y. Discuss how to handle a case where an attribute of X has the same name as some attribute of Y.
Answer to relevant QuestionsDraw the UML equivalents of the E-R diagrams. Design a relational database corresponding to the E-R diagram ofFigure.Consider the relational database of Figure. Give a relational-algebra expression for each of the following queries:a. Find the company with the most employees.b. Find the company with the smallest payroll.c. Find those ...List two reasons why null values might be introduced into the database.Consider the relational database of Figure. Using SQL, define a view consisting of manager-name and the average salary of all employees who work for that manager. Explain why the database system should not allow updates to ...
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