จักรยานได้เหรียญทองหรือเงินกี่เหรียญ ?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
how many received a gold or silver medal in cycling ?It is not neccessary to use all the tables.
 table_203_4:  id [ number]  "medal" [ text]  "name" [ text]  "sport" [ text]  "event" [ text]  "date" [ text] 
SELECT COUNT(DISTINCT "name") FROM table_203_4 WHERE "medal" IN ('gold', 'silver') AND "sport" = 'cycling'