As in other PROC and DATA steps, you can use only a view descriptor or other SAS data set in an SQL procedure statement, not an access descriptor. If you did not create the DBF file, you must be ...

Want faster SQL queries? Here are nine best practices for writing SQL queries that work like a charm (or at least, like they should).

SQL is a convenient way to manage and query your data, but badly written queries can tie up your database. Here are seven common SQL traps and how to avoid them.