SQL Set Theory and Joins

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Across
  1. 4. The subset of elements that are common to both or more subsets.
  2. 5. Is used to combine rows from two or more tables, based on a related column between them.
Down
  1. 1. The ___ operators that use UNION, INTERSECT and EXCEPT in sql.
  2. 2. It removes duplicate rows from the result set when combining from to tables.
  3. 3. The diagram commonly used to represent relationships between sets is called?