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Intro to database systems: Q7. Formulate the following SQL query in relational algebra using an efficient...

Intro to database systems:

Q7. Formulate the following SQL query in relational algebra using an efficient way. The schema is given in the following. Emp(eno, ename, title, city)

Proj(pno, pname, budget, city)

Works(eno, pno, since)

SELECT ename

FROM Works , Emp

WHERE Works.pno = ‘P150’

AND Works.eno = Emp.eno

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