Dear Statalisters

I have two different datasets with information on States and Districts. Since they're two different sources, the numeric values attached to the value labels are different. (the dist and stat are the numeric values attached to the State and District)
eg:
Data Set 1
State District dist stat
Haryana Ambala 1 4
Haryana Kaithal 2 4
Haryana Sonipat 3 4

Data Set 2
State District dist stat
Haryana sonipat 11 8
Haryana kaithal 15 8
Haryana ambala 7 8

What could I do to match/merge these two data sources on district? How could I change the numeric values of either one of them to match the other so that they could be merged?
Thank You for your help
Sayli