CREATE TABLE "south_carolina" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "result" text,
  "candidates" text
);

Question: Who were all candidate when incumbent was D. Wyatt Aiken?
SQL: SELECT "candidates" FROM "south_carolina" WHERE "incumbent"='D. Wyatt Aiken';

Question: How many incumbents for the district of South Carolina 5?
SQL: SELECT COUNT("incumbent") FROM "south_carolina" WHERE "district"='South Carolina 5';

Question: Who was everyone first elected when incumbent was John J. Hemphill?
SQL: SELECT "first_elected" FROM "south_carolina" WHERE "incumbent"='John J. Hemphill';