search *--- 进入某路径 ---* cd *--- 设定内存 ---* set memory 20m *--- 打开和保存数据 ---* clear ues save *--- 导入数据 ---* input edit import *--- 重整数据 ---* append merge xpose reshape gen egen rename drop keep sort encode decode order by 1. 2. 3. 4. 5. 6. ...