CREATE TABLE "squad_changes" (
  "nat" text,
  "name" text,
  "moving_to" text,
  "type" text,
  "transfer_window" text,
  "transfer_fee" text,
  "source" text
);

Question: What was the transfer fee when winter was the transfer window?
SQL: SELECT "transfer_fee" FROM "squad_changes" WHERE "transfer_window"='winter';

Question: What transfer fee has both winter as the transfer window, and Madureira as the moving to?
SQL: SELECT "transfer_fee" FROM "squad_changes" WHERE "transfer_window"='winter' AND "moving_to"='madureira';

Question: What was the moving that has a free transfer fee, and the nationality of CYP, and winter as the transfer window?
SQL: SELECT "moving_to" FROM "squad_changes" WHERE "transfer_fee"='free' AND "nat"='cyp' AND "transfer_window"='winter';

Question: Who is moving to Metalurh Donetsk?
SQL: SELECT "name" FROM "squad_changes" WHERE "moving_to"='metalurh donetsk';

Question: The player moving to Villa Rio has what transfer fee?
SQL: SELECT "transfer_fee" FROM "squad_changes" WHERE "moving_to"='villa rio';

Question: Emerson has what transfer window?
SQL: SELECT "transfer_window" FROM "squad_changes" WHERE "name"='emerson';