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The following table has two attributes A and C where A is the primary key and C is the foreign key referencing A with on-delete cascade.
The set of all tuples that must be additionally deleted to preserve referential integrity when the tuple (2,4) is deleted is:
  • a)
    (3,4) and (6,4)
  • b)
    (5,2) and (7,2)
  • c)
    (5,2), (7,2) and (9,5)
  • d)
    (3,4), (4,3) and (6,4)
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
The following table has two attributes A and C where A is the primary ...
C references A. this means C will only have values that A consists or null. so if you delete (2,4) then every 2 in C need to be deleted and this goes on. until there is no cascading deletion. (5,3) (7,2) will be deleted, then 5 is removed from A, them again (9,5) will be removed from relation. there is no 7 in C so no relation on that value.
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The following table has two attributes A and C where A is the primary key and C is the foreign key referencing A with on-delete cascade.The set of all tuples that must be additionally deleted to preserve referential integrity when the tuple (2,4) is deleted is:a)(3,4) and (6,4)b)(5,2) and (7,2)c)(5,2), (7,2) and (9,5)d)(3,4), (4,3) and (6,4)Correct answer is option 'C'. Can you explain this answer?
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The following table has two attributes A and C where A is the primary key and C is the foreign key referencing A with on-delete cascade.The set of all tuples that must be additionally deleted to preserve referential integrity when the tuple (2,4) is deleted is:a)(3,4) and (6,4)b)(5,2) and (7,2)c)(5,2), (7,2) and (9,5)d)(3,4), (4,3) and (6,4)Correct answer is option 'C'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about The following table has two attributes A and C where A is the primary key and C is the foreign key referencing A with on-delete cascade.The set of all tuples that must be additionally deleted to preserve referential integrity when the tuple (2,4) is deleted is:a)(3,4) and (6,4)b)(5,2) and (7,2)c)(5,2), (7,2) and (9,5)d)(3,4), (4,3) and (6,4)Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The following table has two attributes A and C where A is the primary key and C is the foreign key referencing A with on-delete cascade.The set of all tuples that must be additionally deleted to preserve referential integrity when the tuple (2,4) is deleted is:a)(3,4) and (6,4)b)(5,2) and (7,2)c)(5,2), (7,2) and (9,5)d)(3,4), (4,3) and (6,4)Correct answer is option 'C'. Can you explain this answer?.
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