数据库大概形式如下:
01月
| ID | country | TZ | quantity | value |
| 1001 | US | A | * | * |
| 1002 | CHN | B | * | * |
| 1003 | EU | A | * | * |
| 1004 | US | B | * | * |
| 1005 | CHN | A | * | * |
| 1006 | EU | B | * | * |
| 1007 | US | A | * | * |
| 1008 | CHN | B | * | * |
| 1009 | EU | A | * | * |
| 1010 | US | B | * | * |
| 1011 | CHN | A | * | * |
| 1012 | EU | B | * | * |
| ID | country | TZ | quantity | value |
| 1006 | US | A | * | * |
| 1007 | CHN | B | * | * |
| 1008 | EU | A | * | * |
| 1009 | US | B | * | * |
| 1010 | CHN | A | * | * |
| 1011 | EU | B | * | * |
| 1012 | US | A | * | * |
| 1013 | CHN | B | * | * |
| 1014 | EU | A | * | * |
| 1015 | US | B | * | * |
| 1016 | CHN | A | * | * |
| 1017 | EU | B | * | * |


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