oracle多字段分組取每組求和？

select t.* , sum(統計字段名) over(partition by 分組字段1), sum(統計字段名) over(partition by 分組字段2), sum(統計字段名) over(partition by 分組字段3), ...... sum(統計字段名) over(partition by 分組字段n) from t ;