CREATE TABLE table_21000 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Game site" TEXT, "Record" TEXT, "Attendance" FLOAT)

What date was the opponent the Los Angeles Raiders?
SELECT "Date" FROM table_21000 WHERE "Opponent" = 'Los Angeles Raiders'
SELECT "Date" FROM "table_21000" WHERE "Opponent" = 'Los Angeles Raiders'