CREATE TABLE table_203_84 (id DECIMAL, "rank" DECIMAL, "name" TEXT, "height\ ft  ( m ) " TEXT, "floors" DECIMAL, "year" TEXT, "coordinates" TEXT, "notes" TEXT)

how many of the tallest buildings in oakland were built before 1950 ?
SELECT COUNT("name") FROM table_203_84 WHERE "year" < 1950
SELECT COUNT("name") FROM "table_203_84" WHERE "year" < 1950