Frank who want to install a software program on a single server with multiple users connected should consider cloud computing. This type of computing delivers convenient, on-demand, pay-as-you-go access for multiple customers to a shared pool of configurable computing resources, which is exactly what Frank needs.
This is about identifiers in a record referring to other records.
You can have many to one, one to one, many to many.
E.g., if you have two tables, Authors and Books, then a book record could have a reference to an author record. Since an author can write many books, this would be a many-to-one relationship.
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