Select Operation-selection of rows (tuples) Relation r A B CD X C 1 7 B 5 3 B 23 10 ■OA=BD>5(C) AB CD X 1 7 B B 2310 Database System Concepts-6th Edition 2.9 ©Silberschat乜，Korth and SudarshanDatabase System Concepts - 6 2.9 ©Silberschatz, Korth and Sudarshan th Edition Select Operation – selection of rows (tuples) Relation r  A=B ^ D > 5 (r)