Inserir vários registros no oracle

INSERT ALL
  INTO mytable (column1, column2, column3) VALUES ('val1.1', 'val1.2', 'val1.3')
  INTO mytable (column1, column2, column3) VALUES ('val2.1', 'val2.2', 'val2.3')
  INTO mytable (column1, column2, column3) VALUES ('val3.1', 'val3.2', 'val3.3')
SELECT * FROM dual;