CREATE TABLE "see_also" (
  "airline" text,
  "airline_in_arabic" text,
  "icao" text,
  "callsign" text,
  "commenced_operations" real
);

Question: What is the ICAO with commenced operations before 1989?
SQL: SELECT "icao" FROM "see_also" WHERE "commenced_operations"<1989;

Question: What is the lowest commenced operations that has a nouvelair callsign?
SQL: SELECT MIN("commenced_operations") FROM "see_also" WHERE "callsign"='nouvelair';

Question: What callsign has commenced operations in 2011?
SQL: SELECT "callsign" FROM "see_also" WHERE "commenced_operations"=2011;