The requirements for a logical and physical database vary by size and design parameters. A logical database must be able to access and identify all files within the storage system to operate ...

The candidate key is also known as the primary key, or if a structure has multiple candidate keys, then one of them is designated as the primary key. When building up a logical design, primary keys ...

Inside a relational database management system, the princi­pal persisted data structure is considered a logical relation ... As one composes SQL Select statements, the author may use another query in ...