CREATE TABLE table_name_93 (date VARCHAR, undecided VARCHAR, martin VARCHAR)

What is the Date that has MARTIN of 7 9% and no Undecided?
SELECT date FROM table_name_93 WHERE undecided = "–" AND martin = "7–9%"
SELECT "date" FROM "table_name_93" WHERE "7–9%" = "martin" AND "undecided" = "–"