Relational algebra operators: Duplicate elimination 5 Union u Difference Rename p Sorting T Left outer join...

 

 

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Relational algebra operators: Duplicate elimination 5 Union u Difference\ Rename p Sorting T Left outer join Cartesian product x Grouping/aggregation y Intersection n Projection TT Join Selection Given the following query, write the Relational Algebra operator tree equivalent. SELECT U.id, U.name FROM LibUser AS U LEFT OUTER JOIN Checkout AS C ON U.id = C.uid JOIN Book AS B ON B.isbn = C.isbn WHERE U.debt < 0.25 GROUP BY U.id, U.name HAVING count (C.isbn) > 0; Relational algebra operators: Duplicate elimination 5 Union u Difference\ Rename p Sorting T Left outer join Cartesian product x Grouping/aggregation y Intersection n Projection TT Join Selection Given the following query, write the Relational Algebra operator tree equivalent. SELECT U.id, U.name FROM LibUser AS U LEFT OUTER JOIN Checkout AS C ON U.id = C.uid JOIN Book AS B ON B.isbn = C.isbn WHERE U.debt < 0.25 GROUP BY U.id, U.name HAVING count (C.isbn) > 0;