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ORA-22894: cannot add constraint on existing unscoped REF
columns of non-empty tables



ORA-22894: cannot add constraint on existing unscoped REF columns of non-empty tables..

Answer / guest

Cause: An attempt was made to add a constraint to existing
unscoped REF columns of a table which contains one or more rows.

Action: Remove the constraint specification or add the
constraint after emptying the table.

Please add more information about this Error

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