CREATE TABLE "2009_10" (
  "date_location" text,
  "mens_singles" text,
  "womens_singles" text,
  "u21_mens" text,
  "u21_womens" text,
  "mixed_restricted" text,
  "mixed_veteran" text
);

Question: Who was the U21 Mens winner when Mike Marsden was the mixed restricted winner and Claire Nelson was the U21 Womens winner? 
SQL: SELECT "u21_mens" FROM "2009_10" WHERE "mixed_restricted"='Mike Marsden' AND "u21_womens"='Claire Nelson';

Question: When Naomi Owen won the Womens Singles and Ricardo Walther won the Mens Singles, who won the mixed veteran?
SQL: SELECT "mixed_veteran" FROM "2009_10" WHERE "womens_singles"='Naomi Owen' AND "mens_singles"='Ricardo Walther';

Question: Who won the mixed restricted when Tomasz Rzeszotko won the mixed veteran and Karina Le Fevre won the U21 womens?
SQL: SELECT "mixed_restricted" FROM "2009_10" WHERE "mixed_veteran"='Tomasz Rzeszotko' AND "u21_womens"='Karina Le Fevre';

Question: When and where did Eddie Smith win the mixed veteran?
SQL: SELECT COUNT("date_location") FROM "2009_10" WHERE "mixed_veteran"='Eddie Smith';

Question: When Matt Ware won the mens singles, who won the mixed restricted?
SQL: SELECT "mixed_restricted" FROM "2009_10" WHERE "mens_singles"='Matt Ware';

Question: When Paul Whiting won the mixed veteran, who won the mixed restricted?
SQL: SELECT "mixed_restricted" FROM "2009_10" WHERE "mixed_veteran"='Paul Whiting';