CREATE TABLE "results" (
  "card" text,
  "weight_class" text,
  "round" real,
  "time" text,
  "method" text
);

Question: Which method was used in the welterweight class with a preliminary card?
SQL: SELECT "method" FROM "results" WHERE "weight_class"='welterweight' AND "card"='preliminary';

Question: Which method was used in a round greater than 3?
SQL: SELECT "method" FROM "results" WHERE "round">3;

Question: Which weight class had a time of 4:59?
SQL: SELECT "weight_class" FROM "results" WHERE "time"='4:59';

Question: What was the time for a round less than 3?
SQL: SELECT "time" FROM "results" WHERE "round"<3;

Question: What is the smallest round for the welterweight class with a preliminary card?
SQL: SELECT MIN("round") FROM "results" WHERE "weight_class"='welterweight' AND "card"='preliminary';