CREATE TABLE "lightweight_58_kg" (
  "name" text,
  "bodyweight" real,
  "snatch" real,
  "clean_jerk" real,
  "total_kg" real
);

Question: What is the total (kg) when the snatch was 84, and bodyweight was less than 57.35?
SQL: SELECT AVG("total_kg") FROM "lightweight_58_kg" WHERE "snatch"=84 AND "bodyweight"<57.35;

Question: What is the clean & jerk when the total (kg) is more than 204, and snatch is more than 98?
SQL: SELECT AVG("clean_jerk") FROM "lightweight_58_kg" WHERE "total_kg">204 AND "snatch">98;

Question: What is the total (kg when the bodyweight is more than 57.8, and the clean & jerk is less than 103?
SQL: SELECT SUM("total_kg") FROM "lightweight_58_kg" WHERE "bodyweight">57.8 AND "clean_jerk"<103;