sql - Column Split Sum over a single ID

Question

Similar to a question I had earlier

Having this table

ID, Year, Revenue 
1, 2009, 10 
1, 2009, 20 
1, 2010, 20 
2, 2009, 5 
2, 2010, 50
2, 2010, 1

Is it possible to make a query that results in something similar to this?

ID 2009 2010
1  30   20        
2  5    51

Answer 1

你想用PIVOT

看这里。

在这里：我如何使用枢轴？

更新

使用新信息（Teradata DB），解决方案如下：

select 
  ID,
  Sum(CASE When Year = 2009 then Revenue ELSE 0 END) as Y2009,
  Sum(CASE When Year = 2010 then Revenue ELSE 0 END) as Y2010
From
  YourTable
Group by ID