https://blog.csdn.net/w405722907/article/details/78561995
order by 字段需注意,null排第一位
select * from (
select t.*, row_number() over(partition by t.ywh ORDER BY t.ywh) as bj from table t
) res where res.bj = 1
https://blog.csdn.net/w405722907/article/details/78561995
order by 字段需注意,null排第一位
select * from (
select t.*, row_number() over(partition by t.ywh ORDER BY t.ywh) as bj from table t
) res where res.bj = 1