在mysql中获取求和和和不同的查询

我在表中有如下数据：

==================== 
class | in   | out 
==================== 
1       35      5
2       37      3

我想要这样的结果：

============================ 
Info  |   class    | total
      | 1   |   2  |
============================ 
in      35    37       72
out     5      3        8

那么，如何在mysql中进行查询以获得这些结果呢

请帮帮我，我试过很多次，但都没有成功

谢谢

将两个枢轴组合成一个接头

---

ups，非常抱歉barmar…：

SELECT "in" AS Info,
       MAX(CASE WHEN class = 1 THEN `in` END) AS class1,
       MAX(CASE WHEN class = 2 THEN `in` END) AS class2,
       SUM(`in`) AS total
FROM yourTable
UNION
SELECT "out" AS Info,
       MAX(CASE WHEN class = 1 THEN `out` END) AS class1,
       MAX(CASE WHEN class = 2 THEN `out` END) AS class2,
       SUM(`out`) AS total
FROM yourTable