Question: Write the SQL queries of following questions: Write a query to display all departments no, which have more-than 2 instructors without using Join or Sub

Write the SQL queries of following questions:

  1. Write a query to display all departments no, which have more-than 2 instructors without using Join or Sub Queries.
  2. Write a query to display instructors who have taught course which course id starts except "CS-4".
  3. Write a query using Joins to display 2nd lowest salary of instructor using Join.
  4. Write a query using Joins to display first name, age and department name of youngest instructor's from each department. Using Join

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