Query Processing 1.Parsing and translation 2.Optimization 3.Evaluation query parser and relational-algebra translator expression optimizer query output evaluation engine execution plan data statistics about data Database System Concepts-7th Edition 1.26 @Silberschatz,Korth and SudarshanDatabase System Concepts - 7 1.26 ©Silberschatz, Korth and Sudarshan th Edition Query Processing 1. Parsing and translation 2. Optimization 3. Evaluation