Below is an example of a conceptual schema: A logical data model or logical schema is a representation of the abstract structure of the information domain that defines all the logical constraints ...

The data is stored in the form of files and directories in the hard disk. A hard disk drive has a logical structure that is compatible with the operating system installed. Read on for a full ...

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 ... of business data ...