แหล่งที่มาใดมีบ่อไพ่ 20%?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What source has a cardwell of 20%?It is not neccessary to use all the tables.
 table_78034:  "Source" [ text]  "Date" [ text]  "Cardwell" [ text]  "Jones" [ text]  "Knight" [ text]  "Lanier" [ text]  "Martin" [ text] 
SELECT "Source" FROM table_78034 WHERE "Cardwell" = '20%'