Oracle Error Message
ORA-02014: cannot select FOR UPDATE from view with DISTINCT, GROUP BY, etc.
Reason for the Error
An attempt was made to select FOR UPDATE from a view which had not been merged because the view used syntax (for example, DISTINCT or GROUP BY) preventing the merge, or because of initialization file parameter settings.
Solution
Determine the reason the view will not merge and, if possible, make changes so that it can.