CREATE TABLE table_15002265_1 (mens_doubles VARCHAR, mens_singles VARCHAR, womens_singles VARCHAR)

who is the the mens doubles with mens singles being j rgen koch and womens singles being sabine ploner
SELECT mens_doubles FROM table_15002265_1 WHERE mens_singles = "Jürgen Koch" AND womens_singles = "Sabine Ploner"
SELECT "mens_doubles" FROM "table_15002265_1" WHERE "Jürgen Koch" = "mens_singles" AND "Sabine Ploner" = "womens_singles"