C. Ensuring that foreign key values match primary key values in the referenced table
D. Ensuring that no null values exist
Answer: Option C
Solution (By JKSSB Mock Tests)
Referential integrity ensures that relationships between tables remain consistent, meaning foreign key values must have corresponding primary key values.
Explanation:
The DEFAULT constraint assigns a predefined default value to a column when an INSERT statement does not explicitly provide a value for that column.
No comments yet. Be the first to start the discussion!