CREATE TABLE table_22646 ("Game" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Dolphins points" FLOAT, "Opponents" FLOAT, "Record" TEXT, "Attendance" FLOAT)

How many opponents are at Minnesota Vikings?
SELECT MAX("Opponents") FROM table_22646 WHERE "Opponent" = 'at Minnesota Vikings'
SELECT MAX("Opponents") FROM "table_22646" WHERE "Opponent" = 'at Minnesota Vikings'