CREATE TABLE "roster" (
  "number" real,
  "name" text,
  "position" text,
  "height" text,
  "weight" real,
  "class" text,
  "hometown" text
);

Question: Number of 13 that has what highest weight?
SQL: SELECT MAX("weight") FROM "roster" WHERE "number"=13;

Question: Weight of 220 has what class?
SQL: SELECT "class" FROM "roster" WHERE "weight"=220;

Question: Name of byron geis, and a Weight smaller than 195 involves what average number?
SQL: SELECT AVG("number") FROM "roster" WHERE "name"='byron geis' AND "weight"<195;