Operators on Collections

• Set

  • intersect union except

• Selection

  select result (x, y, …) from col1 as x, col2 as y, …
  
  where predicate(x, y, …)

• Quantificators

  • for all x in collection: predicate(x)
  • exists x in collection: predicate(x)

• Conversion

  • element(singleton)
  • flatten(collection_of_collections)

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