Final answer:
A relationship can be created between two tables that share a common field, enabling the association and query of related data across the tables.
Step-by-step explanation:
When two tables share a common field, a relationship can be created between them to associate the data in these tables. This is an essential concept in relational databases, where the shared field is often a key that uniquely identifies a record in one table and is used to reference records in another table. For example, if there is a Customers table and an Orders table, they may both have a common field called CustomerID. Establishing a relationship between these tables would allow one to query and report data across both tables, such as listing all orders for a particular customer.