Question

Question 1 (1 point) Saved. Find three errors in the accompanying ERD and explain why they are errors. Your answers should be in complete sentences.

Option 1: The cardinality between entities is not defined, leading to potential data integrity issues.
Option 2: Lack of primary keys in certain tables may result in difficulty identifying unique records.
Option 3: Relationships between entities are missing, hindering the establishment of data connections.
Option 4: Redundant attributes in tables may lead to data duplication and storage inefficiency.

Answer 1

The accompanying ERD has three errors: undefined cardinality, missing primary keys, and missing relationships between entities.

Step-by-step explanation:

The accompanying ERD has three errors:

Option 1: The cardinality between entities is not defined, leading to potential data integrity issues.

For example, if the relationship between two entities is one-to-many but not specified, it may result in incorrect data associations.

Option 2: Lack of primary keys in certain tables may result in difficulty identifying unique records. Primary keys are essential for ensuring data integrity and facilitating data retrieval.

Option 3: Relationships between entities are missing, hindering the establishment of data connections. Relationships define how entities are related to each other and are crucial for understanding and manipulating the data.

These errors can lead to data integrity issues, difficulty in identifying unique records, and hindered data connections.

In addition, the ERD may also have redundant attributes, which can cause data duplication and storage inefficiency.