Update Fails with ORA-01779: cannot modify a column which maps to a non key-preserved table

(Doc ID 391728.1)

Last updated on DECEMBER 08, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 8.1.7.4 and later
Information in this document applies to any platform.
***Checked for relevance on 07-Dec-2016***

Symptoms

You have two tables PROYECTO and TABLA.

Cause

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