For more complete information on the relational database model, normalization, and primary keys, visit the following Web sites: Natural keys break the rules Now, let’s see how natural keys stand ...

One of the principles within relational theory is that each entity ... One might be kind when confronted with a data model where everything has a generated primary key and assume such models are ...

The column (field) in a relational database that uniquely identifies the row in the table. For example, account number is often a primary key. A "composite primary key" or "super key" is made up ...

Here’s why Today, Structured Query Language is the standard means of manipulating and querying data in relational ... to the Persons primary key, and to preserve relational integrity that ...

(The relational model doesn’t require that a relationship ... is that a foreign key field must be of the same data type as the primary key. Some systems allow one exception to this rule and ...

scalability [Here’s more information about Key Value databases.] Multivalue (NF2, non-first normal form systems): complex data structures with schemas similar to relational database model [Here ...