CREATE TABLE "squad_information" (
  "nat" text,
  "name" text,
  "since" real,
  "goals" real,
  "ends" real,
  "transfer_fee" text
);

Question: What is the total number of Since with a Goals larger than 6, and a Name with deco?
SQL: SELECT COUNT("since") FROM "squad_information" WHERE "goals">6 AND "name"='deco';

Question: What is the average Ends with a Since of 2003, and a Name with márquez?
SQL: SELECT AVG("ends") FROM "squad_information" WHERE "since"=2003 AND "name"='márquez';

Question: What is the sum of Ends with a Name of abidal, and has a Since larger than 2007?
SQL: SELECT SUM("ends") FROM "squad_information" WHERE "name"='abidal' AND "since">2007;