Enterprise database architectures use three DBMS schema layers to separate the system into internal, external and conceptual tiers. Here's how they work.

When users require access to multiple databases on multiple servers distributed across different physical locations, database security administration can become quite complicated. The commands must be ...

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 ...