比较两排

Question

好日子

我有以下结果集返回：

financeYearEnd   FromDate ToDate  ClientPortfolioCode 
2013-12-31 00:00:00.000 2014-01-01 2014-01-31 C1 
2013-12-31 00:00:00.000 2014-01-01 2014-01-31 C2 
2012-12-31 00:00:00.000 2013-12-01 2013-12-31 C1 
2012-12-31 00:00:00.000 2013-12-01 2013-12-31 C2 

我需要做的是以下几点：

我需要比较的financeYearEnd所有的C1字段（总是只有两个），看看它们是否彼此不同

2013-12-31 00:00:00.000 2014-01-01 2014-01-31 C1 
2012-12-31 00:00:00.000 2013-12-01 2013-12-31 C1 

如所见，financeYearEnd确实不同，所以我需要将该结果作为行存储在临时表中。

这需要对所有不同ClientPortfolioCodes（总是出现在两组）

如何才能实现这一目标做？我试过select distinct .. - 没有工作。这回我的所有行

编辑 -

WITH cteCompareTopTwoYears 
AS (
    SELECT TOP (
      SELECT COUNT(*) * 2 
      FROM #ClientPortFolios 
      ) FinancialYearEnd AS financeYearEnd 
     ,FromDate 
     ,ToDate 
     ,CA.ClientPortfolioCode 
    FROM rpt.F3_fn_ClientPortfolios_CapitalAccount_IncludingYTD CA 
    WHERE (
      (
       CA.FromDate = (DATEADD(m, - 1, @FromDate)) 
       AND CA.ToDate = (DATEADD(m, - 1, @ToDate)) 
       ) 
      OR (
       CA.FromDate = @FromDate 
       AND CA.ToDate = @ToDate 
       ) 
      ) 
     AND (
      CA.ClientPortFolioCode IN (
       SELECT ClientPortfolioCode 
       FROM #ClientPortfolios 
       ) 
      ) 
    ORDER BY FromDate DESC 
    ) 
SELECT * 
FROM cteCompareTopTwoYears c 

Answer 1

也许与ROW_NUMBER的帮助，例如：

WITH CTE AS 
(
    SELECT financeYearEnd, FromDate, ToDate, ClientPortfolioCode, 
      rn = row_Number() OVER (Partition By ClientPortfolioCode 
            Order By financeYearEnd ASC) 
    FROM dbo.TableName 
) 
SELECT financeYearEnd, FromDate, ToDate, ClientPortfolioCode 
FROM CTE 
WHERE rn > 1 

Demo