MySQL的数据透视表

Question

我有以下的mysql表cars布局

BRAND | TYPE | COLOR 
----------------------- 
bmw  | e30 | red 
bmw  | e90 | blue 
bmw  | e12 | red 
audi | a3 | green 
bmw  | e90 | red 
audi | tt | blue 
bmw  | e12 | blue 
audi | a3 | green 

，并希望有一个数据透视表与布局如下结果：

brand_type | red | blue | green | total 
------------------------------------------- 
bmw-e30  | 1  | 0  | 0  | 1 
bmw-e90  | 1  | 1  | 0  | 2 
bmw-e12  | 1  | 1  | 0  | 2 
audi-a3  | 0  | 0  | 2  | 2 
audi-tt  | 0  | 1  | 1  | 2 

我可以achive的farest是这个查询：

SELECT brand, 
    sum(if(color = 'red', 1, 0)) as red, 
    sum(if(color = 'blue', 1, 0)) as blue, 
    sum(if(color = 'green', 1,0)) as green, 
    count(color) as total 
FROM `cars` group by brand; 

有了这样的结果：

brand | red | blue | green | total 
------------------------------------------- 
bmw  | 3  | 2  | 0  | 5 
audi | 0  | 1  | 3  | 4 

我在网上搜索了，但我找不到其中2列（品牌和类型）concated 和在枢轴结果

1.使用任何解决方案如何，我可以达到我想要的数据透视表结果？解决了@kevinsjöberg

SELECT concat(brand, '-', type) as BT, 
    sum(if(color = 'red', 1, 0)) as red, 
    sum(if(color = 'blue', 1, 0)) as blue, 
    sum(if(color = 'green', 1,0)) as green, 
    count(color) as total 
FROM `cars` group by BT; 

的提示[删除第二个问题，因为它是与第一个答案已经解决]

Answer 1

使用从MySQL CONCAT功能。

CONCAT(`BRAND`, '-', `TYPE`) 

然后GROUP BY brand和type。

请参阅http://sqlfiddle.com/#!9/6d3db/2