Modify query sql

Question

I have a query to aggregate (compress) data from 1 min to any other time frame, and it works perfectly.

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

I would like to split second column DataOra(DateTime) into two diferent columns, one for Date (if possibile in dd/mm/yyyy format) and the second for Time only. Any help very appreciated, thanks. Alberto

Answer 1

The easiest way to get these values would be to use CONVERT. SQL Server has some built-in date formatting when you convert a Date.

 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, 

The two codes (103 and 114) correspond to the formats that you want. See http://msdn.microsoft.com/en-us/library/ms187928.aspx for more details about those and the other formats you can convert to.