What types of relationships can be established between tables in Access?

What types of relationships can be established between tables in Access?

• A. Only one-to-one relationships
• B. Hierarchical relationships only
• C. One-to-one, one-to-many, or many-to-many relationships
• D. Multiplex relationships that connect several tables

Answer: (C)

In Microsoft Access, tables can be related in several ways, which allows for flexibility in structuring data. The correct choice identifies that relationships can be one-to-one, one-to-many, or many-to-many. A one-to-one relationship exists when a single record in one table is linked to a single record in another table. This can be used for dividing data that is only relevant to specific scenarios or for separating out information for security or organizational purposes. A one-to-many relationship is more common and occurs when a single record in one table corresponds to multiple records in another table. For example, a customer table could have a one-to-many relationship with an orders table, indicating that one customer can place multiple orders. A many-to-many relationship facilitates cases where multiple records in one table relate to multiple records in another table. This is often represented through a junction table, which holds the keys from the two tables and establishes the relationship between them. For instance, students and courses can be set up in such a way that students can enroll in multiple courses, and each course can have multiple students. Other relationship types such as hierarchical relationships and multiplex relationships are not supported in Access in the same way that traditional relational databases define them. Access focuses on these three established types

In Microsoft Access, tables can be related in several ways, which allows for flexibility in structuring data. The correct choice identifies that relationships can be one-to-one, one-to-many, or many-to-many.

A one-to-one relationship exists when a single record in one table is linked to a single record in another table. This can be used for dividing data that is only relevant to specific scenarios or for separating out information for security or organizational purposes.

A one-to-many relationship is more common and occurs when a single record in one table corresponds to multiple records in another table. For example, a customer table could have a one-to-many relationship with an orders table, indicating that one customer can place multiple orders.

A many-to-many relationship facilitates cases where multiple records in one table relate to multiple records in another table. This is often represented through a junction table, which holds the keys from the two tables and establishes the relationship between them. For instance, students and courses can be set up in such a way that students can enroll in multiple courses, and each course can have multiple students.

Other relationship types such as hierarchical relationships and multiplex relationships are not supported in Access in the same way that traditional relational databases define them. Access focuses on these three established types