CREATE TABLE table_name_19 (season VARCHAR2, acquisition_via VARCHAR2, school_club_team VARCHAR2)

What season did School/Club Team, East have an Acquisition via of trade?
SELECT season FROM table_name_19 WHERE acquisition_via = "trade" AND school_club_team = "east"
SELECT "season" FROM "table_name_19" WHERE "acquisition_via" = "trade" AND "east" = "school_club_team"