CREATE TABLE table_26389588_1 (primary_cartridge VARCHAR2, year_of_introduction VARCHAR2, country_of_origin VARCHAR2)

If the Country of Origin is Denmark and the year of introduction is 1962, what is the primary cartridge?
SELECT primary_cartridge FROM table_26389588_1 WHERE year_of_introduction = "1962" AND country_of_origin = "Denmark"
SELECT "primary_cartridge" FROM "table_26389588_1" WHERE "1962" = "year_of_introduction" AND "Denmark" = "country_of_origin"