Sql 变量的第一行(红移)
感兴趣的行: -日期 -城市 -交付Sql 变量的第一行(红移),sql,Sql,感兴趣的行: -日期 -城市 -交付 如何返回每个城市有史以来第一次交付的表格?我认为它redshift支持row\u number: select * from ( select date, city, delivery, row_number() over (partition by city order by date desc) rn from yourtable ) t where rn = 1
如何返回每个城市有史以来第一次交付的表格?我认为它
redshift
支持row\u number
:
select *
from (
select date, city, delivery,
row_number() over (partition by city order by date desc) rn
from yourtable
) t
where rn = 1