Importar um arquivo CSV para uma Tabela Externa Oracle

create table LD_CMS_BASIS_MIGRATION
(
  contract_number               VARCHAR2(8),
  productcode                   VARCHAR2(3),
  transaction_number            NUMBER,
  effective_date                DATE,
  amendment                     VARCHAR2(3),
  term                          NUMBER,
  active                        VARCHAR2(1),
  agent_number                  VARCHAR2(5),
  premium                       NUMBER,
  icrate                        NUMBER,
  rcrate                        NUMBER,
  ic_allow                      NUMBER,
  rc_allow                      NUMBER,
  sprate                        NUMBER,
  transaction_code              VARCHAR2(4),
  transaction_date              DATE,
  agent_category                VARCHAR2(4),
  agent_sales_code              VARCHAR2(4),
  freq                          VARCHAR2(1),
  tot_premtd                    NUMBER,
  reference                     VARCHAR2(40),
  alternative_commission_method VARCHAR2(40),
  paxus_ref_id                  VARCHAR2(8)
)
ORGANIZATION EXTERNAL ( TYPE ORACLE_LOADER
    DEFAULT DIRECTORY "MIGRATIONS" ACCESS PARAMETERS (
        RECORDS DELIMITED BY NEWLINE
            BADFILE 'CMS_BASIS_MIG_BAD.bad'
            LOGFILE 'CMS_BASIS_MIG_LOG.log'
            SKIP 1
        FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' MISSING FIELD VALUES ARE NULL
    ) LOCATION ( 'CMS_BASIS_MIG.csv' )
) REJECT LIMIT UNLIMITED
    PARALLEL 5;