When you create a Microsoft Access table, Access will automatically create a primary key to your database table. Still, you can also specify the field you want as the primary key for your database ...

When working on a multidimensional design, every fact table within scope should be handled with care. In an ideal world, each low-level fact table represents the metrics related to a business event.

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. Often, ...

One of the principles within relational theory is that each entity’s row or tuple be uniquely identifiable. This means the defined structure includes some combination of attributes whose populated ...

The ClinicalTrials.gov trial registry was expanded in 2008 to include a database for reporting summary results. We summarize the structure and contents of the results database, provide an update of ...

UUID is an abbreviation for 'Universally Unique Identifier' and is unique in that there are no duplicates anywhere in the world. There are several versions of UUID due to historical circumstances, but ...