CREATE TABLE "oregon" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "results" text
);

Question: Which Democratic incumbent was first elected in 1998?
SQL: SELECT "incumbent" FROM "oregon" WHERE "party"='democratic' AND "first_elected"=1998;

Question: Which district has a Democratic incumbent that was first elected before 1996?
SQL: SELECT "district" FROM "oregon" WHERE "party"='democratic' AND "first_elected"<1996;

Question: Who is the incumbent for the Oregon 5 District that was elected in 1996?
SQL: SELECT "incumbent" FROM "oregon" WHERE "first_elected"=1996 AND "district"='oregon 5';

Question: What was the result of the Oregon 5 District incumbent who was first elected in 1996?
SQL: SELECT "results" FROM "oregon" WHERE "first_elected"=1996 AND "district"='oregon 5';