วันไหนมีคะแนน 2-1 ไม่จำเป็นต้องใช้ทุกโต๊ะ
Which date has a score of 2-1?It is not neccessary to use all the tables.
 table_name_6:  (date [ VARCHAR ] score [ VARCHAR) ]
SELECT date FROM table_name_6 WHERE score = "2-1"