CREATE TABLE "squad_members" (
  "player" text,
  "years_played" text,
  "total_w_l" text,
  "singles_w_l" text,
  "doubles_w_l" text
);

Question: what's the years played with singles w-l of 3–2
SQL: SELECT "years_played" FROM "squad_members" WHERE "singles_w_l"='3–2';

Question: what's the doubles w-l for player seol jae-min (none)
SQL: SELECT "doubles_w_l" FROM "squad_members" WHERE "player"='Seol Jae-Min (none)';

Question: what's the singles w-l for kim doo-hwan
SQL: SELECT "singles_w_l" FROM "squad_members" WHERE "player"='Kim Doo-Hwan';

Question: what's the total number of singles w-l with doubles w-l of 0–0 and total w-l of 3–1
SQL: SELECT COUNT("singles_w_l") FROM "squad_members" WHERE "doubles_w_l"='0–0' AND "total_w_l"='3–1';

Question: what's the doubles w-l with years played value of 1 (1968)
SQL: SELECT "doubles_w_l" FROM "squad_members" WHERE "years_played"='1 (1968)';

Question: what years are played for player  im chung-yang
SQL: SELECT "years_played" FROM "squad_members" WHERE "player"='Im Chung-Yang';