ปีแรกที่มีผู้ชนะสามมงกุฎคืออะไร?ไม่จำเป็นต้องใช้ตารางทั้งหมด
what is the first year there was a triple crown winner ?It is not neccessary to use all the tables.
 table_200_3:  id [ number]  "year" [ number]  "winner" [ text]  "jockey" [ text]  "trainer" [ text]  "owner" [ text]  "breeder" [ text] 
SELECT MIN("year") FROM table_200_3