pivote SQL con varias columnas

Question

necesita ayuda con la cláusula de pivote en SQL Server 2008. Tengo una tabla con esta información:

 
Weekno DayOfWeek  FromTime ToTime 
1   2    10:00  14:00 
1   3    10:00  14:00 
2   3    08:00  13:00 
2   4    09:00  13:00 
2   5    14:00  22:00 
3   1    06:00  13:00 
3   4    06:00  13:00 
3   5    14:00  22:00 

quiero convertir esto en una tabla que tiene este aspecto:

 
Week Start1 End1 Start2 End2 Start3 End3 Start4 End4 Start5 End5 Start6 End6 Start7 End7 
1       10:00  14:00 10:00  14:00 
2           08:00  13:00 09:00  13:00 14:00  22:00 
3  06:00  13:00          06:00  13:00 14:00  22:00 

¿Hay alguna manera de hacer con una consulta de pivote? Por favor escriba responder con un ejemplo sobre cómo hacerlo.

Agradezco cualquier tipo de ayuda en esto. Gracias por adelantado.

Answer 1

Personalmente odio los pivotes, difíciles de leer y sin previo aviso.

CREATE TABLE #test 
(
    WeekNo int, 
    [DayOfWeek] int, 
    FromTime time, 
    ToTime time 
    ) 

INSERT INTO #test 
SELECT 1,2,'10:00','14:00' 
UNION ALL 
SELECT 1,3,'10:00','14:00' 
UNION ALL 
SELECT 2,3,'08:00','13:00' 
UNION ALL 
SELECT 2,4,'09:00','13:00' 
UNION ALL 
SELECT 2,5,'14:00','22:00' 
UNION ALL 
SELECT 3,1,'06:00','13:00' 
UNION ALL 
SELECT 3,4,'06:00','13:00' 
UNION ALL 
SELECT 3,5,'14:00','22:00' 

SELECT WeekNo, 
    MAX(CASE WHEN DayOfWeek = 1 THEN FromTime ELSE NULL END) AS Start1, 
    MAX(CASE WHEN DayOfWeek = 1 THEN ToTime ELSE NULL END) AS End1, 
    MAX(CASE WHEN DayOfWeek = 2 THEN FromTime ELSE NULL END) AS Start2, 
    MAX(CASE WHEN DayOfWeek = 2 THEN ToTime ELSE NULL END) AS End2, 
    MAX(CASE WHEN DayOfWeek = 3 THEN FromTime ELSE NULL END) AS Start3, 
    MAX(CASE WHEN DayOfWeek = 3 THEN ToTime ELSE NULL END) AS End3, 
    MAX(CASE WHEN DayOfWeek = 4 THEN FromTime ELSE NULL END) AS Start4, 
    MAX(CASE WHEN DayOfWeek = 4 THEN ToTime ELSE NULL END) AS End4, 
    MAX(CASE WHEN DayOfWeek = 5 THEN FromTime ELSE NULL END) AS Start5, 
    MAX(CASE WHEN DayOfWeek = 5 THEN ToTime ELSE NULL END) AS End5, 
    MAX(CASE WHEN DayOfWeek = 6 THEN FromTime ELSE NULL END) AS Start6, 
    MAX(CASE WHEN DayOfWeek = 6 THEN ToTime ELSE NULL END) AS End6, 
    MAX(CASE WHEN DayOfWeek = 7 THEN FromTime ELSE NULL END) AS Start7, 
    MAX(CASE WHEN DayOfWeek = 7 THEN ToTime ELSE NULL END) AS End7 
    FROM #test 
    GROUP BY WeekNo 

Y volará los calcetines de un pivote; En cuanto al rendimiento.

Answer 2

Aquí está la versión de pivote:

https://data.stackexchange.com/stackoverflow/query/7295/so3241450

-- SO3241450 

CREATE TABLE #SO3241450 (
    Weekno int NOT NULL 
    ,DayOfWeek int NOT NULL 
    ,FromTime time NOT NULL 
    ,ToTime time NOT NULL 
) 

INSERT INTO #SO3241450 VALUES 
(1, 2, '10:00', '14:00') 
,(1, 3, '10:00', '14:00') 
,(2, 3, '08:00', '13:00') 
,(2, 4, '09:00', '13:00') 
,(2, 5, '14:00', '22:00') 
,(3, 1, '06:00', '13:00') 
,(3, 4, '06:00', '13:00') 
,(3, 5, '14:00', '22:00') 

;WITH Base AS (
    SELECT Weekno, DayOfWeek, FromTime AS [Start], ToTime AS [End] 
    FROM #SO3241450 
) 
,norm AS (
SELECT Weekno, ColName + CONVERT(varchar, DayOfWeek) AS ColName, ColValue 
FROM Base 
UNPIVOT (ColValue FOR ColName IN ([Start], [End])) AS pvt 
) 
SELECT * 
FROM norm 
PIVOT (MIN(ColValue) FOR ColName IN ([Start1], [End1], [Start2], [End2], [Start3], [End3], [Start4], [End4], [Start5], [End5], [Start6], [End6], [Start7], [End7])) AS pvt​ 

Answer 3

creo que el caso cuando sólo funcionará si hay solamente es único Weekno y DayofWeek ya que sólo devolverá los registros de última hora de inicio y fin y filtra el resto. Ejemplo

Weekno DayOfWeek  FromTime ToTime 
1   2    10:00  14:00 
1   2    07:00  09:00 
2   3    08:00  13:00 
2   4    09:00  13:00 

Es sólo devolverá la primera fila de weekno 1 de DayofWeek 2 y omita la segunda fila.