Table: iraqi_air_force_1990
Columns: aircraft
1990
destroyed
damaged
to_iran
survived

Question: If there were 14 in 1990 and 6 survived how many were destroyed?
SQL: SELECT "destroyed" FROM iraqi_air_force_1990 WHERE "1990" = 14 AND "survived" = 6

Question: If 4 went to iran and the amount that survived was less than 12.0 how many were there in 1990?
SQL: SELECT COUNT("1990") FROM iraqi_air_force_1990 WHERE "to_iran" = 4 AND "survived" < 12.0

Question: If the aircraft was  ussr mig-25 rb how many were destroyed?
SQL: SELECT "destroyed" FROM iraqi_air_force_1990 WHERE "aircraft" = 'USSR MiG-25 RB'