Basic Steps in Query Processing 1.Parsing and translation 2.Optimization 3.Evaluation query parser and relational-algebra translator expression optimizer ! query evaluation engine output execution plan data statistics about data Database System Concepts-7th Edition 15.3 @Silberschatz,Korth and SudarshanDatabase System Concepts - 7 15.3 ©Silberschatz, Korth and Sudarshan th Edition Basic Steps in Query Processing 1. Parsing and translation 2. Optimization 3. Evaluation