rownumber() over(partition by col1 order by col2)
今天在使用多字段去重时，由于某些字段有多种可能性，只需根据部分字段进行去重，在网上看到了rownumber() over(partition by col1 order by col2)去重的方法，很不错，在此记录分享下： row_number() OVER ( PARTITION BY COL1 ORDER BY COL2) 表示根据COL1分组，在分组内部根据 COL2排序，而此函数计算的
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相关文章
- 1. row_number() OVER (PARTITION BY COL1 ORDER BY COL2)
- 2. Row_number () over (partition by col1 order by col2)的用法
- 3. order by ， group by
- 4. order by group by
- 5. activiti报错order by order by
- 6. hive order by sort by
- 7. oracle row_number() over(partition by .. order by ..)和rank() over(partition by .. order by ..) 和dens
- 8. Rank() over (partition by……order by……）与dense_rank() over (partition by……order by……）的区别
- 9. mysql之group by，order by
- 10. where,group by, having order by