Oracle Database Errors or Warnings from Error ORA-02261 to ORA-02270

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ORA-02261: such unique or primary key already exists in the table
Cause: Self-evident.
Action: Remove the extra key.
ORA-02262: ORA-string occurs while type-checking column default value expression
Cause: New column datatype causes type-checking error for existing column default value expression.
Action: Remove the default value expression or don’t alter the column datatype.
ORA-02263: need to specify the datatype for this column
Cause: The required datatype for the column is missing.
Action: Specify the required datatype.

ORA-02264: name already used by an existing constraint
Cause: The specified constraint name has to be unique.
Action: Specify a unique constraint name for the constraint.
ORA-02265: cannot derive the datatype of the referencing column
Cause: The datatype of the referenced column is not defined as yet.
Action: Make sure that the datatype of the referenced column is defined before referencing it.
ORA-02266: unique/primary keys in table referenced by enabled foreign keys
Cause: An attempt was made to truncate a table with unique or primary keys referenced by foreign keys enabled in another table. Other operations not allowed are dropping/truncating a partition of a partitioned table or an ALTERR TABLE EXCHANGE PARTITION.
Action: Before performing the above operations the table, disable the foreign key constraints in other tables. You can see what constraints are referencing a table by issuing the following command: SELECT * FROM USER_CONSTRAINTS WHERE TABLE_NAME = “tabnam”;

ORA-02267: column type incompatible with referenced column type
Cause: The datatype of the referencing column is incompatible with the
Action: Select a compatible datatype for the referencing column.
ORA-02268: referenced table does not have a primary key
Cause: The referenced table does not have a primary key.
Action: Specify explicitly the referenced table unique key.
ORA-02269: key column cannot be of LONG datatype
Cause: Self-evident.
Action: Change the datatype of the column, or remove the column from the key.
ORA-02270: no matching unique or primary key for this column-list
Cause: A REFERENCES clause in a CREATE/ALTERR TABLE statement gives a column-list for which there is no matching unique or primary key constraint in the referenced table.
Action: Find the correct column names using the ALL_CONS_COLUMNS catalog view

Above are list of Oracle Database Errors or Warnings from Error ORA-02261 to ORA-02270 received while performing certain operation against Oracle Database or related products.

What are Oracle Database Error Messages?

Oracle Error Messages may be returned while using products which are part of Oracle Database.  Each Oracle Database Error or Warning Message mentioned above contains the Warning or Error Message Statement, a short explanation of the probable causes of the Error message, and a recommended action.

Hope this was helpful.

Thanks,
SQLServerF1 Team
Information about Oracle Database Error Messages or Warning Messages on Windows and Linux Operating Systems.

 

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