CREATE TABLE "doubles_5_2_3" (
  "outcome" text,
  "date" text,
  "tournament" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);

Question: What is Partner, when Surface is Hard, and when Score is 6–3, 7–6(0)?
SQL: SELECT "partner" FROM "doubles_5_2_3" WHERE "surface"='hard' AND "score"='6–3, 7–6(0)';

Question: What is Opponents, when Partner is Vitalia Diatchenko?
SQL: SELECT "opponents" FROM "doubles_5_2_3" WHERE "partner"='vitalia diatchenko';

Question: What is Partner, when Outcome is Winner, and when Date is 12 October 2003?
SQL: SELECT "partner" FROM "doubles_5_2_3" WHERE "outcome"='winner' AND "date"='12 october 2003';

Question: What is Opponents, when Partner is Mervana Jugić-Salkić?
SQL: SELECT "opponents" FROM "doubles_5_2_3" WHERE "partner"='mervana jugić-salkić';