CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "event" text,
  "round" real,
  "time" text,
  "location" text
);

Question: The tko (doctor stoppage) method was used in a loss against which opponent?
SQL: SELECT "opponent" FROM "mixed_martial_arts_record" WHERE "method"='tko (doctor stoppage)' AND "res"='loss';

Question: How many total rounds used the submission (choke) method?
SQL: SELECT SUM("round") FROM "mixed_martial_arts_record" WHERE "method"='submission (choke)';

Question: What was the time of the match with a record of 9-0 and used the tko (doctor stoppage) method?
SQL: SELECT "time" FROM "mixed_martial_arts_record" WHERE "method"='tko (doctor stoppage)' AND "record"='9-0';

Question: What was the lowest round number at the UFC 16 event with a record of 19-1-1?
SQL: SELECT MIN("round") FROM "mixed_martial_arts_record" WHERE "event"='ufc 16' AND "record"='19-1-1';