CREATE TABLE table_203_486 (id NUMBER, "place" NUMBER, "team" CLOB, "matches" NUMBER, "won" NUMBER, "drawn" NUMBER, "lost" NUMBER, "difference" CLOB, "points" NUMBER)

during the 1951 world ice hockey championships , what was the difference between the first and last place teams for number of games won ?
SELECT (SELECT "won" FROM table_203_486 ORDER BY "place" LIMIT 1) - (SELECT "won" FROM table_203_486 ORDER BY "place" DESC LIMIT 1)
SELECT (SELECT "won" FROM "table_203_486" ORDER BY "place" FETCH FIRST 1 ROWS ONLY) - (SELECT "won" FROM "table_203_486" ORDER BY "place" DESC FETCH FIRST 1 ROWS ONLY)