SQL SERVER 2008的转置函数PIVOT

CREATE TABLE Sales.SalesByMonth
(
year char(4),
month char(3),
amount MONEY,
PRIMARY KEY(year,month)
)

INSERT INTO Sales.SalesByMonth(year,month,amount)
values('2007','Jan',789.0000),
('2007','Feb',389.0000),
('2007','Mar',8867.0000),
('2007','Apr',778.0000),
('2007','May',78.0000),
('2007','Jun',9.0000),
('2007','Jul',987.0000),
('2007','Aug',866.0000),
('2007','Sep',7787.0000),
('2007','Oct',85576.0000),
('2007','Nov',855.0000),
('2007','Dec',5875.0000),

('2008','Jan',7.0000),
('2008','Feb',6868.0000),
('2008','Mar',688.0000),
('2008','Apr',9897.0000)

SELECT YEAR,
SUM(case when month='Jan' then amount else 0 end) as 'Jan',
SUM(case when month='Feb' then amount else 0 end) as 'Feb',
SUM(case when month='Mar' then amount else 0 end) as 'Mar',
SUM(case when month='Apr' then amount else 0 end) as 'Apr',
SUM(case when month='May' then amount else 0 end) as 'May',
SUM(case when month='Jun' then amount else 0 end) as 'Jun',
SUM(case when month='Jul' then amount else 0 end) as 'Jul',
SUM(case when month='Aug' then amount else 0 end) as 'Aug',
SUM(case when month='Sep' then amount else 0 end) as 'Sep',
SUM(case when month='Oct' then amount else 0 end) as 'Oct',
SUM(case when month='Nov' then amount else 0 end) as 'Nov',
SUM(case when month='Dec' then amount else 0 end) as 'Dec'
FROM Sales.SalesByMonth
group by year

select YEAR,[Jan],[Feb],[Mar],[Apr],[May],[Jun],
[Jul],[Aug],[Sep],[Oct],[Nov],[Dec]
FROM
(Select YEAR,amount,month from Sales.SalesByMonth) as SalesByMonth
pivot (sum(amount) for month in
(
[Jan],[Feb],[Mar],[Apr],[May],[Jun],
[Jul],[Aug],[Sep],[Oct],[Nov],[Dec]
)) as ourPivot
order by year

select [Jan],[Feb],[Mar],[Apr],[May],[Jun],
[Jul],[Aug],[Sep],[Oct],[Nov],[Dec]
FROM
(Select amount,month from Sales.SalesByMonth) as SalesByMonth
pivot (sum(amount) for month in
(
[Jan],[Feb],[Mar],[Apr],[May],[Jun],
[Jul],[Aug],[Sep],[Oct],[Nov],[Dec]
)) as ourPivot