请问各位老师,如果想把stata两个有一列相同变量的数据合并,需要什么命令?
我的数据如下:
数据1:
registy_id | Var2 |
1001 | PR0001 |
1001 | PR0002 |
1001 | PR0003 |
1001 | PR0004 |
1001 | PR0005 |
1706 | VI00001 |
7891 | MA0002 |
7908 | MA0003 |
7917 | MA0004 |
7935 | MA0007 |
7935 | MA0008 |
7935 | MA0009 |
7971 | MA0007 |
数据2:
Var2 | Var3 |
PR0001 | 3400318187 |
PR0001 | 3602755576 |
PR0001 | 3400421975 |
PR0002 | 3602395433 |
PR0003 | 3602998058 |
PR0004 | 3602989648 |
PR0005 | 3601313255 |
VI00001 | 3602712635 |
MA0002 | 3602923859 |
MA0002 | 3602684907 |
MA0004 | 3400430132 |
MA0007 | 3602470260 |
MA0008 | 3400335389 |
然后我想让他们合并成:
registy_id | Var2 | Var3 |
1001 | PR0001 | 3400318187 |
1001 | PR0001 | 3602755576 |
1001 | PR0001 | 3400421975 |
1001 | PR0002 | 3602395433 |
1001 | PR0003 | 3602998058 |
1001 | PR0004 | 3602989648 |
1001 | PR0005 | 3601313255 |
1706 | VI00001 | 3602712635 |
7891 | MA0002 | 3602923859 |
7891 | MA0002 | 3602684907 |
7908 | MA0003 | 3602712635 |
7917 | MA0004 | 3400430132 |
7935 | MA0007 | 3602470260 |
7935 | MA0008 | 3400335389 |
7935 | MA0009 | |
| 7971 | MA0007 |
|
请问各位老师,这里该用什么命令呢? 谢谢