51แต้มต่อมีกี่แต้มไม่จำเป็นต้องใช้ทุกโต๊ะ
The 51 points against, how many are for?It is not neccessary to use all the tables.
 table_31879:  "Matches" [ text]  "Lost" [ text]  "Drawn" [ text] 
SELECT "Points for" FROM table_31879 WHERE "Points against" = '51'