group by rollup和 group by cube區別
一、分組依據爲一列時 1、使用group by分組查詢 select exam_no,avg (result) as 平均分 from result_info
group by exam_no 查詢結果如下： 2、使用group by rollup 和group by cube的結果 select exam_no,avg(result) as 平均分 from result_info
gro
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相關文章
- 1. group by rollup和 group by cube區別
- 2. SQL ：group by all | group by ··· with cube |group by with rollup 的用法
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