CREATE TABLE "singles_titles" (
  "date" real,
  "tournament" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score" text
);

Question: Which Tournament has a Score of 6–4, 6–2?
SQL: SELECT "tournament" FROM "singles_titles" WHERE "score"='6–4, 6–2';

Question: Which Score has an Opponent in the final of mehdi tahiri?
SQL: SELECT "score" FROM "singles_titles" WHERE "opponent_in_the_final"='mehdi tahiri';

Question: Which Date has a Score of 6–3, 7–6?
SQL: SELECT SUM("date") FROM "singles_titles" WHERE "score"='6–3, 7–6';

Question: Which Date has a Score of 7–6(3), 4–6, 6–2?
SQL: SELECT SUM("date") FROM "singles_titles" WHERE "score"='7–6(3), 4–6, 6–2';

Question: Which Surface has a Tournament of olbia?
SQL: SELECT "surface" FROM "singles_titles" WHERE "tournament"='olbia';