Which action is prevented by referential integrity enforcement when deleting a row from a parent table?

easy📝 Conceptual Q2 of 15

SQL - Table Relationships

AInserting duplicate primary keys in the parent table

BDeleting any row regardless of child table references

CUpdating a primary key value in the parent table

DDeleting a row that has matching foreign keys in child tables without handling them

Step-by-Step Solution

Solution:

Step 1: Understand delete restrictions with referential integrity
Deleting a parent row referenced by child rows is restricted unless handled (cascade or restrict).
Step 2: Identify what is prevented
It prevents deleting parent rows that would leave orphaned child rows.
Final Answer:
Deleting a row that has matching foreign keys in child tables without handling them -> Option D
Quick Check:
Referential integrity prevents orphan deletes [OK]

Quick Trick: Cannot delete parent row if child rows exist without cascade [OK]

Common Mistakes:

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