Database Users naive users sophisticated application database (tellers,agents, users administrators web users) programmers (analysts) use write use use application application query administration interfaces programs tools tools compiler and linker DML queries DDL interpreter application program DML compiler object code and organizer query evaluation engine query processor Database System Concepts-7th Edition 1.3经 Silberschatz,Korth and SudarshanDatabase System Concepts - 7 1.32 ©Silberschatz, Korth and Sudarshan th Edition Database Users