https://www.semanticscholar.org/topic/Pseudocolumn/12380860
Pseudocolumn | Semantic Scholar
A Pseudocolumn is a "column" that yields a value when selected, but which is not an actual column of the table. An example is RowID or SysDate. It is often...
pseudocolumnsemanticscholar
https://www.ibm.com/docs/en/db2/11.5.x?topic=oracle-rownum-pseudocolumn
ROWNUM pseudocolumn
Any unresolved and unqualified column reference to the ROWNUM pseudocolumn is converted to the OLAP specification ROW_NUMBER() OVER().
rownumpseudocolumn