Question

我在SQL Server中有表。我想找到每组中的最后一行。我尝试使用以下查询，但它不会返回确切的结果。 ID列是PK，其他列设置为NOT NULL。

select ID, Name FROM 
(select ID, Name, max(ID) over (partition by Name) as MAX_ID
from Customer) x where ID= MAX_ID

更清楚。我有2个问题。首先：

ALTER PROCEDURE [dbo].[Ramiz_Musterija_RowNum]
@Datum DATE,
@BrojKamiona INT
AS SET NOCOUNT ON
SELECT Ime,MusterijaID,RowNum=ROW_NUMBER() OVER(ORDER BY Ime)FROM Musterije
WHERE Datum=@Datum AND BrojKamiona=@BrojKamiona  GROUP BY Ime,MusterijaID

第二个：

ALTER PROCEDURE [dbo].[Ramiz_Musterija_FindLast]
@Datum DATE,
@BrojKamiona INT
AS SET NOCOUNT ON
SELECT a.* from Musterije a
JOIN (SELECT Ime, MAX(MusterijaID) AS MAXID FROM Musterije GROUP BY Ime) AS b 
ON a.MusterijaID = b.MAXID AND a.Datum=@Datum AND a.BrojKamiona=@BrojKamiona

然后LINQ查询：

  var rowNumList = from f in customerFindLastList
                     join r in customerRowNumList
                     on f.MusterijaID equals r.MusterijaID
                     select new { r.RowNum };

我试图找到每一行的最后一行，然后在MusterijaID列上匹配这两个查询。任何有关这方面的帮助将不胜感激。这是一组的输出。现在，问题是这两个查询在“4250”MusterijaID上匹配，但我需要匹配“4229”上的查询。

Ime MusterijaID
100//1  4246
100//1  4247
100//1  4248
100//1  4249
100//1  4250
100//1  4229

Answer 1

select ID, Name 
FROM (select ID, Name, -- add other columns here
             ROW_NUMBER() over (partition by Name ORDER BY ID DESC) as MAX_ID
      from Customer) x
WHERE MAX_ID = 1

通过query-SQL Server查找组中的最后一行

1 个答案: