CREATE TABLE table_20538 ("Team" TEXT, "Outgoing manager" TEXT, "Manner of departure" TEXT, "Date of vacancy" TEXT, "Replaced by" TEXT, "Date of appointment" TEXT)

Who was the outgoing manager for Aberdeen?
SELECT "Outgoing manager" FROM table_20538 WHERE "Team" = 'Aberdeen'
SELECT "Outgoing manager" FROM "table_20538" WHERE "Team" = 'Aberdeen'