Question: Who won the womens doubles when Wu Jianqui won the womens singles?
SQL: SELECT "Womens doubles" FROM "1-12027364-1" WHERE "Womens singles" = 'Wu Jianqui';

Question: Who won the mixed doubles when Ji Xinpeng won the mens singles?
SQL: SELECT "Mixed doubles" FROM "1-12027364-1" WHERE "Mens singles" = 'Ji Xinpeng';

Question: How many womens singles winners were there when Peter Rasmussen won the mens singles?
SQL: SELECT COUNT("Womens singles") FROM "1-12027364-1" WHERE "Mens singles" = 'Peter Rasmussen';