CREATE TABLE "table1_26389588_1" (
  "name_designation" text,
  "year_of_introduction" text,
  "country_of_origin" text,
  "primary_cartridge" text,
  "primary_user" text
);

Question: If the country of Origin is South Africa, who is the primary user?
SQL: SELECT "primary_user" FROM "table1_26389588_1" WHERE "country_of_origin"='South Africa';

Question: If the Country of Origin is Denmark and the year of introduction is 1962, what is the primary cartridge?
SQL: SELECT "primary_cartridge" FROM "table1_26389588_1" WHERE "year_of_introduction"='1962' AND "country_of_origin"='Denmark';

Question: How many different years was the name/designation cetme?
SQL: SELECT COUNT("year_of_introduction") FROM "table1_26389588_1" WHERE "name_designation"='CETME';

Question: If the country of origin is switzerland, what is the name/ designation?
SQL: SELECT "name_designation" FROM "table1_26389588_1" WHERE "country_of_origin"='Switzerland';