CREATE TABLE table_name_46 (against NUMBER, status VARCHAR2, date VARCHAR2)

Lowest against for tour match on 21 july 1990?
SELECT MIN(against) FROM table_name_46 WHERE status = "tour match" AND date = "21 july 1990"
SELECT MIN("against") FROM "table_name_46" WHERE "21 july 1990" = "date" AND "status" = "tour match"