Question: Write an SQL query that returns the roll number and names of the students whose gender is same as their advisor's (use subquery) Assuming that

  1. Write an SQL query that returns the roll number and names of the students whose gender is same as their advisor's (use subquery)
  2. Assuming that every relation has exactly 10 tuples how many times the subquery will be executed
  3. Write a query for the problem in (a) without using subquery.
  4. Compare the performance of (a) and (c)

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