CREATE TABLE "opinion_polling_for_the_united_states_se" (
  "poll_source" text,
  "dates_administered" text,
  "democrat_mark_begich" text,
  "republican_ted_stevens" text,
  "lead_maragin" real
);

Question: What was Mark Begich polling on October 6, 2008?
SQL: SELECT "democrat_mark_begich" FROM "opinion_polling_for_the_united_states_se" WHERE "dates_administered"='October 6, 2008';

Question: When the poll source is research 2000/daily kos, what is the total number of dates administered? 
SQL: SELECT COUNT("dates_administered") FROM "opinion_polling_for_the_united_states_se" WHERE "poll_source"='Research 2000/Daily Kos';

Question: On July 17, 2008, what was the total number of lead maragin? 
SQL: SELECT COUNT("lead_maragin") FROM "opinion_polling_for_the_united_states_se" WHERE "dates_administered"='July 17, 2008';