Question: Consider the following relational schema. The key attributes are bold and underlined Consider the following relational schema. The key attributes are bold and underlined Emp

Consider the following relational schema. The key attributes are bold and underlined

Consider the following relational schema. The key attributes are bold and underlined Emp (eid, did, sal, hobby) Dept (did, dname, floor, phone) Finance (did, budget, sales, expenses) Consider the following query: SELECT d.dname, f.budget FROM emp e, dept d, finance f WHERE e.did = d.did AND d.did = f.did AND d.floor = 100,000 AND e.hobby= 'tennis' Draw an initial query tree using Cartesian product, selection, and projection. Draw a query tree optimizes the SQL query using heuristic approach

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