The following is the ORA-22804 error message, you can learn the cause and solution of the Oracle database error.
ORA-22804 remote operations not permitted on object tables or user-defined type columns
Cause: An attempt was made to perform queries or DML operations on remote object tables or on remote table columns whose type is one of object, REF, nested table or VARRAY.
Solution: Remove the reference to remote tables in the statement.
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