Chapter 5, Problem 5.30RQ

Explanation of Solution

Representation of the recursive one-to-one relationship (1:1):

• The simplest type of a recursive binary relationship is one-to-one relationship is one of the types of recursive binary relationship that refer to the relationship between two entities which means one field or record in a table has either zero or one field or record in another table in recursive manner.
• Let us consider the following example:

Explanation:

• In the below example, “Person_ID” is a primary key and “Spouse_ID” is a foreign key. Placing the primary key of one row into another row as a foreign key.

Difference between recursive one-to-one relationship and non-recursive one-to-one relationship:

Recursive one-to-one relationship	Non-recursive one-to-one relationship
The one “Person” is married to another “Person” and each person is not married to more than one person...