Table: copper_mining_arizona
Columns: rank
mine
county
operator
source_of_copper
2012_cu_production_lbs

Question: Which operator has a rank of 7?
SQL: SELECT "operator" FROM copper_mining_arizona WHERE "rank" = 7

Question: What's the lowest ranking source of copper, copper ore, concentrated and leached?
SQL: SELECT MIN("rank") FROM copper_mining_arizona WHERE "source_of_copper" = 'copper ore, concentrated and leached'

Question: What's the name of the operator who has the mission complex mine and has a 2012 Cu Production (lbs) larger than 23.3?
SQL: SELECT "operator" FROM copper_mining_arizona WHERE "2012_cu_production_lbs" > 23.3 AND "mine" = 'mission complex'