rownumber() over(partition by col1 order by col2)
今天在使用多字段去重時，由於某些字段有多種可能性，只需根據部分字段進行去重，在網上看到了rownumber() over(partition by col1 order by col2)去重的方法，很不錯，在此記錄分享下： row_number() OVER ( PARTITION BY COL1 ORDER BY COL2) 表示根據COL1分組，在分組內部根據 COL2排序，而此函數計算的
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相關文章
- 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報錯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……）與dense_rank() over (partition by……order by……）的區別
- 9. mysql之group by，order by
- 10. where,group by, having order by