Question: a- Draw the query graph. b- Draw the query tree corresponding to the relational algebra expression. Draw the initial query tree, then show how the

a- Draw the query graph.
b- Draw the query tree corresponding to the relational algebra expression.
Draw the initial query tree, then show how the same query tree is optimized by heuristic rules optimization in another figure.
draw it plz a- Draw the query graph. b- Draw the query tree corresponding

Q 4: SELECT Pnumber, Pname, COUNT () FROM PROJECT, WORKS_ON, EMPLOYEE WHERE Pnumber=Pno AND Ssn=Essn AND Dno =5 GROUP BY Pnumber, Pname

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