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Foreign key related to which of the following DBMS constraint?
  • a)
    Key constraint
  • b)
    Referential integrity constraint
  • c)
    Domain constraints
  • d)
    Single value constraint
Correct answer is option 'B'. Can you explain this answer?
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Foreign key related to which of the following DBMS constraint?a)Key co...
Referential Integrity Constraint.
When a foreign key value is used it must reference a valid, existing primary key in the parent table. For instance, deleting a record that contains a value referred to by a foreign key in another table would break referential integrity.
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Foreign key related to which of the following DBMS constraint?a)Key co...
Referential Integrity Constraint.
When a foreign key value is used it must reference a valid, existing primary key in the parent table. For instance, deleting a record that contains a value referred to by a foreign key in another table would break referential integrity.
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Foreign key related to which of the following DBMS constraint?a)Key constraintb)Referential integrity constraintc)Domain constraintsd)Single value constraintCorrect answer is option 'B'. Can you explain this answer?
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