Good is the following I'm messing here with some data, I have a table with census data.
Tables
First table where you have the data.
Fields residencia_nut3, trabajo_nut3 values 112, 180 values 149,146
table nut3 id fields, description 112 port values values 149 coimba 180 lisbon values 146 values santarem
table nut2 id fields, description values 11 north 14 center 18 south
Now I can do data flow with the nut3 but with the nut 2 I do not know how to do it. associate nut 3 to nut 2.