How ORA_ROWSCN Works with Rowdependencies and Norowdependecies
(Doc ID 805424.1)
Last updated on AUGUST 04, 2018
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.1 to 18.104.22.168 [Release 10.2 to 11.1]
Information in this document applies to any platform.
***Checked for relevance on 13-Sep-2016***
For each row, ORA_ROWSCN returns the conservative upper bound system change number (SCN) of the most recent change to the row. This pseudocolumn is useful for determining approximately when a row was last updated. It is not absolutely precise, because Oracle tracks SCNs by transaction committed for the block in which the row resides. You can obtain a more fine-grained approximation of the SCN by creating your tables with row-level dependency tracking. In this note we will try to see how ORA_ROWSCN works with Rowdependencies and Norowdependecies with examples:
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