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      Question

      Which of the following is not a type of SQL

      JOIN?
      A INNER JOIN Correct Answer Incorrect Answer
      B LEFT OUTER JOIN Correct Answer Incorrect Answer
      C CROSS JOIN Correct Answer Incorrect Answer
      D CIRCULAR JOIN Correct Answer Incorrect Answer
      E FULL OUTER JOIN Correct Answer Incorrect Answer

      Solution

      CIRCULAR JOIN does not exist in SQL. Valid joins include INNER JOIN (matching rows only), LEFT/RIGHT OUTER JOIN (all rows from one side), FULL OUTER JOIN (all rows from both), SELF JOIN (table joined with itself), and CROSS JOIN (Cartesian product).

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