ORA-02331: cannot create constraint on column of datatype string
Cause: An attempt was made to create a constraint on a column posessing a non-constrainable datatype -- VARRAY, nested table, object, LOB, FILE, or REF.
Action: Change the column datatype, or remove the constraint.
Cause: An attempt was made to create a constraint on a column posessing a non-constrainable datatype -- VARRAY, nested table, object, LOB, FILE, or REF.
Action: Change the column datatype, or remove the constraint.
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