1.17、获取每个城市运费前两名订单 1.17、获取每个城市运费前两名订单 postgres =# select * from ( select row_number () over ( partition by begincity order by amount desc ),* from bills ) wh...
1.12、first_value(value any)返回第一值 1.12、first_value(value any)返回第一值 postgres =# select first_value ( amount ) over ( partition by begincity order by id ),* from bills...
1.8、cume_dist() —返回行数除以记录数值 1.8、cume_dist() —返回行数除以记录数值 postgres =# select ROUND (( cume_dist () over ( partition by begincity order by id )):: NUMERIC , 2 ) AS cume_d...