Can I use… row_number() (without order by)


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The row_number() window function can be used without order by in over to arbitrarily assign a unique value to each row.

SELECT ROW_NUMBER() OVER ()
  FROM …

Normative References

The row_number() window function is defined in ISO/IEC 9075:2016-2 as part of optional feature T611, “Elementary OLAP operations”. Using row_number() without order by is part of optional feature T612.

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