Question

A ___ relationship exists between two tables when one record in the first table matches zero, one, or many records in the second table.

1) One-to-One
2) One-to-Many
3) Many-to-Many
4) None of the above

Answer 1

A One-to-Many relationship exists when one record in the first table matches zero, one, or many records in the second table.

Step-by-step explanation:

A One-to-Many relationship exists between two tables when one record in the first table matches zero, one, or many records in the second table. In this type of relationship, the primary key in the first table is linked to the foreign key in the second table. For example, in a database of students and their courses, one student can have multiple courses, but each course is associated with only one student.

One advantage of grouping data in a One-to-Many relationship is that it allows for efficient storage and retrieval of information. Instead of duplicating data, the relationship links the tables together and avoids redundancy. This helps maintain data integrity and can improve database performance.

In this particular question, the correct answer is One-to-Many because it describes the relationship where one record in the first table matches zero, one, or many records in the second table.

Answer 2

A One-to-Many relationship exists when one record in the first table matches zero, one, or many records in the second table.

Step-by-step explanation:

A One-to-Many relationship exists between two tables when one record in the first table matches zero, one, or many records in the second table. In this type of relationship, the primary key in the first table is linked to the foreign key in the second table. For example, in a database of students and their courses, one student can have multiple courses, but each course is associated with only one student.

One advantage of grouping data in a One-to-Many relationship is that it allows for efficient storage and retrieval of information. Instead of duplicating data, the relationship links the tables together and avoids redundancy. This helps maintain data integrity and can improve database performance.

In this particular question, the correct answer is One-to-Many because it describes the relationship where one record in the first table matches zero, one, or many records in the second table.