CREATE TABLE table_203_548 (id NUMBER, "rank" NUMBER, "nation" CLOB, "gold" NUMBER, "silver" NUMBER, "bronze" NUMBER, "total" NUMBER)

how many more bronze medals were awarded than silver ?
SELECT (SELECT SUM("bronze") FROM table_203_548) - (SELECT SUM("silver") FROM table_203_548)
SELECT (SELECT SUM("bronze") FROM "table_203_548") - (SELECT SUM("silver") FROM "table_203_548")