Question

我有一个查询，可以将数据从1分钟聚合（压缩）到任何其他时间范围，并且运行正常。

Use StockDataFromSella;
DECLARE @D1 DateTime 
DECLARE @D2 DateTime 
DECLARE @Interval FLOAT 

SET @D1  = '2008-09-21T09:00:00.000' 
SET @D2  = '2010-10-20T17:30:00.000'
SET @Interval = 15 

;WITH  
L0 AS (SELECT 1 AS c UNION ALL SELECT 1), 
L1 AS (SELECT 1 AS c FROM L0 A CROSS JOIN L0 B), 
L2 AS (SELECT 1 AS c FROM L1 A CROSS JOIN L1 B), 
L3 AS (SELECT 1 AS c FROM L2 A CROSS JOIN L2 B), 
L4 AS (SELECT 1 AS c FROM L3 A CROSS JOIN L3 B), 
Nums AS (SELECT ROW_NUMBER() OVER (ORDER BY (SELECT 0)) AS i FROM L4), 
Ranges AS( 
SELECT  
      DATEADD(MINUTE,@Interval*(i-1),@D1) AS StartRange, 
      DATEADD(MINUTE,@Interval*i,@D1) AS NextRange 
FROM Nums where i <= 1+CEILING(DATEDIFF(MINUTE,@D1,@D2)/@Interval)) 
,cte AS ( 
SELECT  
     *  
     ,ROW_NUMBER() OVER (PARTITION BY Simbolo,r.StartRange ORDER BY [DataOra])      AS RN_ASC  
     ,ROW_NUMBER() OVER (PARTITION BY Simbolo,r.StartRange ORDER BY [DataOra] DESC) AS RN_DESC 
FROM Ranges r 
JOIN dbo.tbl1MinENI p  ON p.[DataOra] >= r.StartRange and p.[DataOra] < r.NextRange ) 
SELECT  
      Simbolo, 
      MAX(CASE WHEN RN_ASC=1 THEN [DataOra] END) AS DataOra, 
      MAX(CASE WHEN RN_ASC=1 THEN [Apertura] END) AS [Apertura], 
      MAX(Massimo) Massimo, 
      MIN(Minimo)  Minimo, 
      MAX(CASE WHEN RN_DESC=1 THEN [Chiusura] END) AS [Chiusura],
      SUM(Volume) Volume
      /*MAX(CASE WHEN RN_DESC=1 THEN [DataOra] END) AS ChiusuraDataOra*/
FROM cte 
GROUP BY Simbolo,StartRange 
ORDER BY DataOra

我想将第二列DataOra（DateTime）拆分为两个不同的列，一个用于Date（如果可能是dd / mm / yyyy格式），第二个列用于Time。任何帮助非常感谢，谢谢。阿尔贝托

Answer 1

获取这些值的最简单方法是使用CONVERT。转换Date时，SQL Server有一些内置的日期格式。

 CONVERT(VARCHAR, MAX(CASE WHEN RN_ASC=1 THEN [DataOra] END), 103) AS DataOraDate, 
 CONVERT(VARCHAR, MAX(CASE WHEN RN_ASC=1 THEN [DataOra] END), 114) AS DataOraTime,

两个代码（103和114）对应于您想要的格式。有关这些以及您可以转换为的其他格式的详细信息，请参阅http://msdn.microsoft.com/en-us/library/ms187928.aspx。

Answer 2

因为看起来你只需要改变选择。而不是这个

MAX(CASE WHEN RN_ASC=1 THEN [DataOra] END) AS DataOra,

使用此：

CONVERT(VARCHAR(8),MAX(CASE WHEN RN_ASC=1 THEN [DataOra] END),108) AS HourMinuteSecond,
CONVERT(VARCHAR(8),MAX(CASE WHEN RN_ASC=1 THEN [DataOra] END),101) AS DateOnly,

希望它有所帮助。

修改查询sql

2 个答案: