hzsh2009 发表于 2012-10-24 01:11 
还有个小问题,比如一个data里面都是国家和他们对应的代码, 另一个里面都是国家(顺序是乱的),怎么把第 ...
if you work on that in stata
say, you have 2 data sets
data1: county id
data2: county var1
county is a unique identifier in each data set.
use data1, clear
sort county
save, replace
use data2,clear
sort county
merge 1:1 county using data1