CREATE TABLE table_203_707 (id NUMBER, "rank" NUMBER, "npc" CLOB, "gold" NUMBER, "silver" NUMBER, "bronze" NUMBER, "total" NUMBER)

what was the difference in gold medals between russia and china ?
SELECT (SELECT "gold" FROM table_203_707 WHERE "npc" = 'china') - (SELECT "gold" FROM table_203_707 WHERE "npc" = 'russia')
SELECT (SELECT "gold" FROM "table_203_707" WHERE "npc" = 'china') - (SELECT "gold" FROM "table_203_707" WHERE "npc" = 'russia')