I have no idea what sql command will return the results I need from 1 table.

example of table and values

col1 col2 col3(unique values)
1 1 abc
1 1 dev
1 2 rst
1 3 ndb
1 3 mnv

I need an sql query, that returns the distinct combined values of col1
and col2 and the first value of that distinct combination from col3.


return values should...