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ql row_ number reset at 0 Value
原标题:sql row_number reset at 0 value

我的表格有以下价值:

Value
0
1.2
1.3
1.4
0
1.2
1.3
1.4

从上述数据来看,我需要将设计之后的2个最高数字重新计算为0,从而达到2.8。

如果我能够接下去,每当有零时重新开始,那将是完美的,但并没有提供这种功能。

Thanks.

最佳回答
DECLARE @your_table TABLE (id INT,value FLOAT) 

INSERT INTO @your_table
SELECT 1,0 UNION ALL
SELECT 2,1.2 UNION ALL
SELECT 3,1.3 UNION ALL
SELECT 4,1.4 UNION ALL
SELECT 5,0 UNION ALL
SELECT 6,1.2 UNION ALL
SELECT 7,1.3 UNION ALL
SELECT 8,1.4


;WITH T AS
(
SELECT 
   ROW_NUMBER() OVER (PARTITION BY CASE WHEN value = 0 THEN 0 ELSE 1 END ORDER BY id)-
   ROW_NUMBER() OVER (ORDER BY id ) AS Grp
,id,value
FROM @your_table
), T2 AS
(
SELECT MAX(value) AS value
FROM T
WHERE value<>0
GROUP BY Grp)
SELECT SUM(value)
FROM T2
问题回答

你们利用RANK或DENSE进行审判。 按条款分列的参与情况?

奥凯,我找到了与“Martin”相同的解决办法,我确实承认“@marc_s”对此没有什么简单。 我只字不提两个组别之间的关系,而把这两个组分起来就在本表中得出结果。

id value row_number
1  0.0    0
2  1.2   -1
3  1.3   -1
4  1.4   -1
5  0.0   -3
6  1.2   -2
7  1.3   -2
8  1.4   -2

我认为,从这里看,这显然需要做些什么。 Ignore the 0es, group by the row_ number use the maxgroup and voilá!





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