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Many students who study using our platform have reported that a large number of the practice questions here are very similar to those that appear in real exams. View Courses
Many students who study using our platform have reported that a large number of the practice questions here are very similar to those that appear in real exams. View Courses
Which of the following is the unique identifier of a record as defined by a primary key field?
Correct Answer: c) Entity Integrity
Entity Integrity ensures that each record in a table has a unique identifier, which is defined by the primary key. This rule prevents duplicate or null values in the primary key field, ensuring that each record is uniquely identifiable.
Domain Integrity – Ensures that data values in a column conform to a defined data type, range, or format (e.g., restricting an age column to numeric values). It does not enforce uniqueness.
Referential Integrity – Ensures that foreign keys correctly reference primary keys in related tables, preventing orphan records. It does not define the uniqueness of a record itself.
User-designed Integrity – A broad concept where users define custom rules to maintain data accuracy, but it is not directly related to primary keys.
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