CREATE TABLE table_203_777 (id DECIMAL, "years" TEXT, "building" TEXT, "city" TEXT, "height  ( ctbuh ) " TEXT, "floors" DECIMAL)

which building in canada was the first to be taller than 200m ?
SELECT "building" FROM table_203_777 WHERE "height (ctbuh)" > 200 ORDER BY "years" LIMIT 1
SELECT "building" FROM "table_203_777" WHERE "height (ctbuh)" > 200 ORDER BY "years" NULLS FIRST LIMIT 1