SQL 对结果集进行分组排序过滤重复数据

简单的表操作：

select row_number() over(partition by A.gid order by A.gid  ) as RowN,
A.* from Fit_Order A 

关联表操作

select * from (
select   row_number() over(partition by GID order by gid ASC) as RowN, *
 from
(select
A.*,B.*
 from Fit_Order A INNER JOIN  Fit_OrderDetail  (nolock) B ON A.Gid=B.OrderGid
 ) AS BB
where
BB.OrderType='银联支付'
 ) TT  where TT.RowN=1

With AS 子查询 递归CTE 方式

 WITH TemGid AS
  (
  select  A.Gid  from Fit_Order(nolock) A  Where   A.OrderType='银联支付' )
 
    SELECT  * FROM (
         SELECT ROW_NUMBER() OVER(PARTITION BY BB.ShopPreGid ORDER BY BB.ShopPreGid ASC ) AS Row_Num,*
                FROM(
                         select  A.Gid AS ShopPreGid ,A.CreateDate,   B.DetailStatus
                         FROM
                        ( SELECT * FROM Fit_Order(nolock)  WHERE Gid IN (SELECT * FROM TemGid )) A
                        inner join  Fit_OrderDetail  (nolock) B ON A.Gid=B.OrderGid)AS  BB
                         WHERE
                          BB.DetailStatus!='已完成'
                          ) TT
                          WHERE  TT.Row_Num=1