Tables within a database management system (DBMS) need primary keys and defined indexes in order for the DBMS to have the opportunity to provide good query performance. Without indexing, the worst ...

What's the difference b/n a DBMS and a file system. So far from what I have been able to gather a file system 'manages' files (e.g. XFS, NTFS) and a DBMS stores data usng a format/structure (e.g.

Suppose you have a SAS data set, DLIB.BIRTHDAY, that contains employee ID numbers, last names, and birthdays. (See Sample Data for a description of DLIB.BIRTHDAY.) You want to update this data set ...