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.

creates SAS/ACCESS descriptor files that describe DBMS data to the SAS System. It also can create a SAS data file from DBMS data. DBLOAD procedure loads SAS or other DBMS data into a DBMS file. SQL ...