CREATE TABLE table_203_612 (id NUMBER, "rank" NUMBER, "nation" CLOB, "gold" NUMBER, "silver" NUMBER, "bronze" NUMBER, "total" NUMBER)

what is the difference in medals for fiji and tonga ?
SELECT (SELECT "total" FROM table_203_612 WHERE "nation" = 'fiji') - (SELECT "total" FROM table_203_612 WHERE "nation" = 'tonga')
SELECT (SELECT "total" FROM "table_203_612" WHERE "nation" = 'fiji') - (SELECT "total" FROM "table_203_612" WHERE "nation" = 'tonga')