行列轉換

老一點的寫法

CREATE TABLE SALES1
(
[Year] INT,
Quarter CHAR(2),
Amount FLOAT
)
GO
INSERT INTO SALES1 VALUES (2001, ‘Q1’, 80)
INSERT INTO SALES1 VALUES (2001, ‘Q2’, 70)
INSERT INTO SALES1 VALUES (2001, ‘Q3’, 55)
INSERT INTO SALES1 VALUES (2001, ‘Q3’, 110)
INSERT INTO SALES1 VALUES (2001, ‘Q4’, 90)
INSERT INTO SALES1 VALUES (2002, ‘Q1’, 200)
INSERT INTO SALES1 VALUES (2002, ‘Q2’, 150)
INSERT INTO SALES1 VALUES (2002, ‘Q2’, 40)
INSERT INTO SALES1 VALUES (2002, ‘Q2’, 60)
INSERT INTO SALES1 VALUES (2002, ‘Q3’, 120)
INSERT INTO SALES1 VALUES (2002, ‘Q3’, 110)
INSERT INTO SALES1 VALUES (2002, ‘Q4’, 180)
INSERT INTO SALES1 VALUES (2002, ‘Q5’, 380)
GO

SELECT * FROM SALES1
PIVOT
(SUM (Amount) –使用SUM聚合數量列
FOR [Quarter] –PIVOT Quarter 列
IN (Q1, Q2, Q3, Q4, Q5)) –使用季節
AS P
GO

新一點的寫法

declare @SALES1 table
(
  [Year] date,
  Quarter varchar(20),
  Amount varchar(5)
)

INSERT INTO @SALES1 VALUES ('2008-8-8', '拜仁', '勝')
,('2008-8-9', '奇才', '勝')
,('2008-8-9'
 
, '湖人', '勝')
,('2008-8-10', '拜仁', '負')
,('2008-8-8', '拜仁', '負')
,('2008-8-12', '奇才', '勝')
,('2008-8-12', '奇才', '平')

SELECT * FROM @SALES1

SELECT * FROM @SALES1
PIVOT
(count (year) --使用SUM聚合數量列
FOR Amount --PIVOT Quarter 列
IN (勝,負,平)) --使用季節
AS P