Question: For each of the following queries perform heuristic query optimization using query trees. Assume the Employee database as the schema used in the queries SELECT

For each of the following queries perform heuristic query optimization using query trees. Assume the Employee database as the schema used in the queries

SELECT E.Fname, E.LName, E.Address

FROM EMPLOYEE E, DEPARTMENT D

WHERE D.DName=``Research''

AND D.Dnumber=E.Dno; • Select Pnumber

FROM PROJECT, DEPARTMENT, EMPLOYEE

WHERE Dnum=Dnumber

AND Mgrssn=Ssn AND Lname=``Smith''.

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