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Consider the relations r(A, B) and s(B, C), where s.B is a primary key and r.B is a foreign key referencing s.B. Consider the query

Let LOJ denote the natural left outer-join operation. Assume that r and s contain no null values.
Which one of the following queries is NOT equivalent to Q?
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'C'. Can you explain this answer?
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Consider the relations r(A, B) and s(B, C), where s.B is a primary key...
 will include record with b > = 5 but other three queries will not.
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Consider the relations r(A, B) and s(B, C), where s.B is a primary key and r.B is a foreign key referencing s.B. Consider the queryLet LOJ denote the natural left outer-join operation. Assume that r and s contain no null values.Which one of the following queries is NOT equivalent to Q?a)b)c)d)Correct answer is option 'C'. Can you explain this answer?
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Consider the relations r(A, B) and s(B, C), where s.B is a primary key and r.B is a foreign key referencing s.B. Consider the queryLet LOJ denote the natural left outer-join operation. Assume that r and s contain no null values.Which one of the following queries is NOT equivalent to Q?a)b)c)d)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 Consider the relations r(A, B) and s(B, C), where s.B is a primary key and r.B is a foreign key referencing s.B. Consider the queryLet LOJ denote the natural left outer-join operation. Assume that r and s contain no null values.Which one of the following queries is NOT equivalent to Q?a)b)c)d)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 Consider the relations r(A, B) and s(B, C), where s.B is a primary key and r.B is a foreign key referencing s.B. Consider the queryLet LOJ denote the natural left outer-join operation. Assume that r and s contain no null values.Which one of the following queries is NOT equivalent to Q?a)b)c)d)Correct answer is option 'C'. Can you explain this answer?.
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