In DBMS software referential integrity ensures that

Question

BlackTom AI · Accepted Answer

Consider the concept being tested: referential integrity in a DBMS.
Option a: 'a value entered into field as a primary key already exists as a foreign key value in a related table.' This is incorrect because referential integrity concerns foreign keys referencing existing primary keys, not the reverse scenario of a primary key appearing as a foreign key.
Option b: 'each foreign key is an autonumber.' This statement is false in general; foreign keys can be user-specified values that reference primary keys in another table, not necessarily autonumbered. Autonumbering is not a defining requirement of referential integrity.
Option c: 'a value entered into field as a foreign key already exists as a primary key value in a related table.' This captures the core idea: any value placed in a foreign key column must exist as a corresponding primary key in the related (referenced) table, ensuring valid references and preventing orphaned records.
Option d: 'each primary key is an autonumber.' This is not a requirement of referential integrity. Primary keys can be natural keys or surrogate keys, and autonumbering is a design choice, not a referential integrity constraint.
Overall, the options describe various aspects of keys and references; only option c aligns with the formal constraint that foreign key values must reference existing primary keys in the related table, which enforces referential integrity.

In DBMS software referential integrity ensures thatSingle choice

Similar Questions

In DBMS software referential integrity ensures that

A new café ordering database allows orders to be entered even when the customer ID does not exist in the customer table. Later, reports show orphaned orders that cannot be tied to real customers. Which database control would have best prevented this?

Question at position 4 A referential integrity constraint is a rule that maintains consistency among the rows of two relations.TrueFalse

Consider the Baseball database used in a number of class examples. We enforced referential integrity for Teams and Batters. This means _________

Question at position 26 Referential integrity requires that if a field (attribute) references the value of another field (attribute), such as the situation with foreign keys, then the referenced value must exist.TrueFalse

Referential integrity means:

Which statement best explains referential integrity?

Which referential Integrity enforcement option would you select if you want to prevent a user from deleting a record in a parent table (e.g., Customer) as long as it is still referenced by records in a child table (e.g., Orders)?

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler