human
Schema:
architect (id, name, nationality, gender)
bridge (architect_id, id, name, location, length_meters, length_feet)
mill (architect_id, id, location, name, type, built_year, notes)
Please answer with SQL.
assistant
Sure, I understand.
human
Which architects have nationality 'American' or 'Canadian'?
assistant
SELECT * FROM architect WHERE nationality = 'American' OR nationality = 'Canadian';
human
Find all mills that are built by these architects.
assistant
SELECT * FROM mill AS T1 JOIN architect AS t2 ON T1.architect_id = T2.id WHERE T2.nationality = 'American' OR T2.nationality = 'Canadian';
human
What are the distinct types of these mills?
assistant
SELECT DISTINCT T1.type FROM mill AS T1 JOIN architect AS t2 ON T1.architect_id = T2.id WHERE T2.nationality = "American" OR T2.nationality = "Canadian" ;