1-to-1 becomes 1-to-many relationship

1. What is the difference between 1 to 1 and 1 to many relationship?
2. What is a 1 to 1 relationship database?
3. How is a relationship related to one-to-many?
4. What is a 1 to 1 relationship in a ER diagram?

What is the difference between 1 to 1 and 1 to many relationship?

One-to-one relationships associate one record in one table with a single record in the other table. One-to-many relationships associate one record in one table with many records in the other table. Save this answer.

What is a 1 to 1 relationship database?

A one-to-one relationship is a link between the information in two tables, where each record in each table only appears once.

How is a relationship related to one-to-many?

Example. If the two entity types are 'Customer' and 'Account,' each 'Customer' can have many 'Accounts,' but each 'Account' can only be owned by one 'Customer. ' In this case, we can say that each customer is linked to a number of accounts. As a result, the relationship is one-to-many.

What is a 1 to 1 relationship in a ER diagram?

A one-to-one relationship in an ER diagram is denoted, like all relationships, with a line connecting the two entities. The “one” cardinality is denoted with a single straight line. (The “many” cardinality is denoted with a crow's foot symbol .) The perpendicular straight lines mean “mandatory”.