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- select country_id, city_id, person_id from mytable
- country_id,city_id,person_id
- 123,45,100334
- 123,45,3460456
- 123,45,943875
- 123,121,4362
- 123,121,124747
- 146,87,3457320
- 146,89,3495879
- 146,89,34703924
- select country_id, city_id, person_id, ???, ??? from mytable
- country_id,city_id,person_id,country_num,city_num
- 123,45,100334,1,1
- 123,45,3460456,1,1
- 123,45,943875,1,1
- 123,121,4362,1,2
- 123,121,124747,1,2
- 146,87,3457320,2,1
- 146,89,3495879,2,2
- 146,89,34703924,2,2
- SELECT
- *,
- dense_rank() OVER (ORDER BY country_id),
- dense_rank() OVER (PARTITION BY country_id ORDER BY city_id)
- FROM
- mytable
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