Oliver Pongratz ชนะประเภทคู่ผสมกี่คู่?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
How many Mixed Doubles won when Oliver Pongratz won the Men's Singles?It is not neccessary to use all the tables.
 table_12164707_1:  (mixed_doubles [ VARCHAR ] mens_singles [ VARCHAR) ]
SELECT COUNT(mixed_doubles) FROM table_12164707_1 WHERE mens_singles = "Oliver Pongratz"