水平获取数据而不是垂直获取数据

Question

考虑查询：

Select Dealer, Sales from DEALERDATA
where period in (201106,201107)

这将得到结果：

DEALER SALES

Dealer1 100000
Dealer1 200000
Dealer2 600000
Dealer2 700000

我希望结果为

DEALER SALES SALES
Dealer1 100000 200000
Dealer2 600000 700000

如果有人能告诉我如何实现这一目标？

非常感谢， 莎朗....

Answer 1

对于少数列，您可以使用CASE结合总和

SELECT Dealer
, SUM(CASE WHEN period=201106 THEN Sales ELSE 0 END) sales201106
, SUM(CASE WHEN period=201107 THEN Sales ELSE 0 END) sales201107
FROM DEALERDATA
WHERE period IN (201106,201107)
GROUP BY Dealer