ORACLE分析函数

1，rollup函数 select class 班级, subject 科目, sex 性别,sum(score) 总分数 from sailing_class group by rollup(class,subject,sex) order by class,subject,sex; 解释： sum(汇总字段) group by rollup(字段A,字段B,字段C) 该函数会先对(A

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