给定输入表到输出表的SQL查询

Question

我想知道查询结果

Answer 1

您可以通过以下查询

来达到预期的结果

SELECT *
FROM   cardata
       PIVOT(AVG(Price) FOR YEAR IN ([2010], [2011], [2012])) AS PivotTable;

所以在这里你必须使用聚合函数来使用Pivot。

Answer 2

您可以使用PIVOT / UNPIVOT。解决方案是here

Answer 3

您需要使用PIVOT：SQL Fiddle

数据

create table cars(brand varchar(100),myear int,price bigint)

insert into cars 

select 'audi',2010,5000000    union all
select 'audi',2011,5340000    union all
select 'audi',2012,5890000    union all
select 'bmw',2010,6000000     union all
select 'bmw',2011,6780000     union all
select 'bmw',2012,4450000     union all
select 'maruti',2010,4540000  union all
select 'maruti',2011,7800000  union all
select 'maruti',2012,9000000  

<强>查询

SELECT * FROM
cars
PIVOT
(
 MAX(PRICE) FOR MYEAR IN ([2010],[2011],[2012])
)P