คะแนนของเกมที่เล่นบนพื้นหญ้าเป็นเท่าใด?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
What was the score of the game that was played on a grass surface?It is not neccessary to use all the tables.
 table_6978:  "Date" [ text]  "Tournament" [ text]  "Surface" [ text]  "Partnering" [ text]  "Score" [ text] 
SELECT "Score" FROM table_6978 WHERE "Surface" = 'grass'