CREATE TABLE table_75493 ("Record" TEXT, "Team" TEXT, "Season" TEXT, "League" TEXT, "Number" FLOAT)

What season has a number less than 90, Mitte as the league and spvgg ruhmannsfelden as the team?
SELECT "Season" FROM table_75493 WHERE "Number" < '90' AND "League" = 'mitte' AND "Team" = 'spvgg ruhmannsfelden'
SELECT "Season" FROM "table_75493" WHERE "League" = 'mitte' AND "Number" < '90' AND "Team" = 'spvgg ruhmannsfelden'