Accessing SQL from a Programming Language A database programmer must have access to a general-purpose programming language for at least two reasons Not all queries can be expressed in SQL,since SQL does not provide the full expressive power of a general-purpose language. 图 Non-declarative actions--such as printing a report,interacting with a user,or sending the results of a query to a graphical user interface-- cannot be done from within SQL. Database System Concepts-7th Edition 5.3 ©Silberscha乜，Korth and SudarshanDatabase System Concepts - 7 5.3 ©Silberschatz, Korth and Sudarshan th Edition Accessing SQL from a Programming Language ▪ Not all queries can be expressed in SQL, since SQL does not provide the full expressive power of a general-purpose language. ▪ Non-declarative actions -- such as printing a report, interacting with a user, or sending the results of a query to a graphical user interface -- cannot be done from within SQL. A database programmer must have access to a general-purpose programming language for at least two reasons