如何根据条件选择不同的记录

Question

我有等重复记录表 现在我只想要一个记录来自重复记录，其最新创建日期为我该怎么做？

Answer 1

使用row_number()：

select EnquiryId, Name, . . .
from (select t.*,
             row_number() over (partition by enquiryID order by CreatedDate desc) as seqnum
      from table t
     ) t
where seqnum = 1;

Answer 2

使用ROW_NUMBER函数标记CreatedDate排序的重复记录，如下所示：

;with CTE AS (
    select *, row_NUMBER() over(
                 partition by EnquiryID -- add columns on which you want to identify duplicates
                 ORDER BY CreatedDate DESC) as rn
    FROM TABLE 
)
select * from CTE
where rn = 1