Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_19794 ( "Year" real, "Mens singles" text, "Womens singles" text, "Mens doubles" text, "Womens doubles" text, "Mixed doubles" text )

### Question ###
who is the the mens doubles with mens singles being j rgen koch and womens singles being sabine ploner

### Accurate SQL ###

SELECT "Mens doubles" FROM table_19794 WHERE "Mens singles" = 'Jürgen Koch' AND "Womens singles" = 'Sabine Ploner'