Introduction (Cont.) An evaluation plan defines exactly what algorithm is used for each operation,and how the execution of the operations is coordinated. I(t to remove duplicates) (hash join) (merge join) course pipeline pipeline dept_name-Music 0 year=2009 (use index 1) (use linear scan)） instructor teaches Find out how to view query execution plans on your favorite database Database System Concepts-6th Edition 1.4 ©Silberschat乜，Korth and SudarshanDatabase System Concepts - 6 1.4 ©Silberschatz, Korth and Sudarshan th Edition Introduction (Cont.) An evaluation plan defines exactly what algorithm is used for each operation, and how the execution of the operations is coordinated. Find out how to view query execution plans on your favorite database