มีกี่ตอนเฉลี่ยไม่ต่ำกว่า 0.70 ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
how many episodes had at least an average of 0.70 ?It is not neccessary to use all the tables.
 table_204_958:  id [ number]  "episode" [ number]  "average" [ number]  "rank" [ number]  "remarks" [ text] 
SELECT COUNT("episode") FROM table_204_958 WHERE "average" >= 0.7