In a relational database approach, regardless of whether one is considering persisted data or transitory query results, almost everything is viewed as a logical table. Associations between these ...

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 ...

To add and remove a Primary Key from an Access database table, follow the methods below. 1] How to remove the default Primary key from Access Table Open the database that you want to alter.

For National 5 Computing Science, revise the use of primary and foreign keys and the difference between flat file and relational databases.