我有这张桌子:
+----+--------+-------+
| id | fruit | a-b-c |
+----+--------+-------+
| 1 | orange | a |
+----+--------+-------+
| 2 | banana | c |
+----+--------+-------+
| 3 | orange | c |
+----+--------+-------+
| 4 | orange | a |
+----+--------+-------+
| 5 | orange | b |
+----+--------+-------+
现在我想列出所有的水果,并sum根据a-b-c价值观.a=1,b=2和c=3.所以,这将是我想要的结果:
+--------+-----+
| fruit | sum |
+--------+-----+
| banana | 3 |
+--------+-----+
| orange | 7 |
+--------+-----+ …