的特定的增量项目计数考虑一个图表,显示各种水果的数量,它们在存在:MySQL的:获取的是满足条件
x---------x-----x
| FRUIT | QTY |
x---------x-----x
| Apple | 4 |
| Orange | 5 |
| Mango | 4 |
| Grape | 1 |
| Plum | 2 |
| Peach | 2 |
x---------x-----x
从这个表我要查询水果的数量(即算一算具有特定数量从0开始,并在MAX(数量)结束的记录数),所以我的结果集是:
x-----x-------x
| QTY | COUNT |
x-----x-------x
| 0 | 0 | //0 fruits have 0 quantity
| 1 | 1 | //1 fruit (Grape) has 1 quantity
| 2 | 2 | //2 fruits (Plum, Peach) have 2 quantity
| 3 | 0 | //0 fruits have 3 quantity
| 4 | 2 | //2 fruits (Apple, Mango) have 4 quantity
| 5 | 1 | //1 fruit (Orange) has 5 quantity
x-----x-------x
如何才能实现这一目标?