Question 10301 – Database-Management-System
March 6, 2024Question 10305 – Database-Management-System
March 6, 2024Question 10302 – Database-Management-System
Give a relational algebra expression using only the minimum number of operators from (∪, −) which is equivalent to R ∩ S.
Correct Answer: A
Question 3 Explanation:
R – (R – S)
→ No need of using Union operation here.
→ In question they gave (∪, −) but we don’t use both.
→ And also they are saying that only the minimum number of operators from (∪, −) which is equivalent to R ∩ S.
So, the expression is minimal.
→ No need of using Union operation here.
→ In question they gave (∪, −) but we don’t use both.
→ And also they are saying that only the minimum number of operators from (∪, −) which is equivalent to R ∩ S.
So, the expression is minimal.
Out of syllabus (For explanation see below)
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