The primary key offers several characteristics, such as it uniquely identifies each row in the database, It always contains a value, it is never empty, and the value contains never change. To add ...

Database developers have strong opinions on this facet of primary key design. This article settles ... could change the value’s format by adding or deleting characters or even completely ...

Some database designers may feel that it’s OK to arbitrarily assign all dimensional foreign keys as part of a fact’s primary key even when one or more do not actually contribute to the fact table’s ...

A primary key is a field used to uniquely identify every record in the database. Sometime primary keys are obvious, for example a car license plate could be used to uniquely identify cars.