stock | date | x1 | x2 |
4 | 2007-8-20 | 11 | 13 |
5 | 2007-8-6 | 1.08 | 11 |
文件二
stock | date | y1 | y2 |
4 | 2007-1-4 | 0.3 | -2 |
4 | 2007-8-20 | 0.4 | -0.1 |
4 | 2007-12-28 | 0.6 | 5 |
5 | 2007-1-4 | 0.4 | -1 |
5 | 2007-8-6 | 0.5 | -3 |
5 | 2007-12-28 | 0.7 | -2 |
想合并为
stock | date | y1 | y2 | stock | date | x1 | x2 |
4 | 2007-1-4 | 0.3 | -2 |
|
|
|
|
4 | 2007-8-20 | 0.4 | -0.1 | 4 | 2007-8-20 | 11 | 13 |
4 | 2007-12-28 | 0.6 | 5 |
|
|
|
|
5 | 2007-1-4 | 0.4 | -1 |
|
|
|
|
5 | 2007-8-6 | 0.5 | -3 | 5 | 2007-8-6 | 1.08 | 11 |
5 | 2007-12-28 | 0.7 | -2 |
|
|
|
|
如何编程?期盼指教!


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