CREATE TABLE table_7209 ("Team" TEXT, "Outgoing manager" TEXT, "Manner of departure" TEXT, "Date of vacancy" TEXT, "Replaced by" TEXT, "Date of appointment" TEXT)

What is Aberdeen team's date of vacancy?
SELECT "Date of vacancy" FROM table_7209 WHERE "Team" = 'aberdeen'
SELECT "Date of vacancy" FROM "table_7209" WHERE "Team" = 'aberdeen'